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Humminbird 120 Fishin' Buddy 4-Inch Waterproof Fishfinder

4.4 out of 5 stars 128 customer reviews
| 36 answered questions

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  • 4-inch LCD display
  • 240ft Depth Capability
  • 8 Level Grayscale
  • Temperature Included
  • 30 Hours of Operation
  • 240ft Depth Capability
  • 4" Monochrome LCD
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Technical Details

  • Waterproof

Product Description

Use it on your boat, your buddy's boat, a dock, or even a float tube . Fishin' Buddy Fish finders give everyone the ultimate in portability, with an ergonomic clamp mount design you can use nearly anywhere, with absolutely no rigging or wiring, or even a transducer to mount. You'll love the high resolution monochrome display and powerful SideFinding sonar that you can point in any direction to find more fish. The 24" transducer tube housing reaches the water from most small or mid-size fishing boats.

Product Information

Technical Details

Item Weight 2 pounds
Product Dimensions 15.1 x 11 x 29.1 inches
California residents Click here for Proposition 65 warning
Item model number 407120-1
Display Size 4 inches
Display Resolution 240 x 160 pixels
Warranty One year limited warranty

Additional Information

ASIN B0012BNKMG
Customer Reviews
4.4 out of 5 stars 128 customer reviews

4.4 out of 5 stars
Best Sellers Rank #187 in Electronics > Marine Electronics > Fish Finders & Depth Finders
#7,377 in Sports & Outdoors > Sports & Fitness > Hunting & Fishing > Fishing > Fishing Watercraft & Trolling Motors
Shipping Weight 6.5 pounds
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available July 7, 2004

Warranty & Support

Warranty, Parts:Parts
Product Warranty: For warranty information about this product, please click here

Customer Reviews

Top Customer Reviews

By Raffpap on October 11, 2011
Edition: B&W, Dual Beam Sonar 1000W
I fly fish a lot of lakes and use this on my 9' Bucks Bags pontoon boat. I attribute a full 50% of my fishing success to this fish finder. I rely on the depth finder feature more than anything else.....all the rest are just bonuses. Feeding trout like shallow water (where their food sources are located). I have noticed that it will give false fish readings when I enter shallow water less than 10' or so, as it will pick up every weed growing off the bottom. I know I'm too shallow when it suddenly beeps continuously and displays a constant parade of fish! The side finder feature, with it's 60' range, has saved the day on a few occasions by letting me know whether the fish are shallower or deeper that day. It's a great indicator of fish activity, too. When the fish are very active and moving aggressively, the side finder shows it, as it becomes very active. I can actually see their distance as they move to/from the boat, as the display distance rapidly changes. On slow fish activity days, the side finder is mostly inactive and silent. With good alkaline batteries, I can get 35-40 hours of operating time and only have to change the batteries every 10th trip or so. To be fair, when I'm anchored and into fish, I shut it off. My only issue with this finder, and the other portables I've owned over the years, is the thin wires on the battery pack and the connections. In my experience, they are the first things to fail! One must use extreme care in changing batteries, and be careful not to put too much pressure on these wires, or bend them in any way.
1 Comment 44 of 50 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Edition: B&W, Dual Beam Sonar 1000W
I bought one of these units for my kayak but have been unable to mount it so the transducer and shaft don't stick into the water at an angle. The clamp mounting system needs a straight surface to attach too, which aren't common in molded kayaks. The other drawback is the unit wobbles inside the sleeve even at extremely low speeds, I mean low like barely paddling at all!
However, in general I'm satisfied with the product. It's easy to use, identifies structure, fish and schools of baitfish well. I've caught several fish with it. The batteries last a very long time, it's easy to read in bright sunlight. I've used it on other boats where a there was a better mounting surface and it performed better, but the wobbling issue was still present. Don't expect to troll with this unit.
2 Comments 23 of 25 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Edition: B&W, Dual Beam Sonar 1000W
I have used the 120 model on 8 to 10 all day fishing trips so far and have been very happy with it. The setup and operation is simple enough for anyone to figure out, but also has enough different settings and ranges to make it useful just about anywhere. The unit runs on 6 AA batteries and I get about three 10 hour days one one set. Carry an extra set with you because when they die you only get about 1 minutes notice. I have been using mine from a kayak trout fishing in Colorado and the portability is great. The side finder is a great feature and one that I find myself constantly using but, the narrow view(all models are the same)is why it gets a 4 star rating instead of 5.
Overall this is a great fishfinder for a portable unit, and I would highly recommend it if you do not have the option for a permanant mount and a 12 volt system.
Comment 38 of 45 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Edition: B&W, Dual Beam Sonar 1000W Verified Purchase
This thing is great! I use it for my canoe and it has paid for it's self already. The price of fish in the store is about 6-7 bucks a pound, plus if you factor in that bluegill, crappie, perch are specialty fish that takes the price up to at least 9-12 bucks a pound. If you can find them yourself you get the freshest fish possible. That's what this unit will do for you. If you picture using a flashlight at night and how the beam of it lights up things, that's just how the side finding part of it works. That's how the manual describes it's ability to do side finding for fish. If there is a big tree log in the way you will not be able to see through it. It's not an x-ray machine. But you will be able to see up into lets say a downed tree with all the smaller branches under the water. That is prime fishing area for bluegill and crappie. I have also used this thing with my other fish finder to compare them, it's a "humminbird 597 ci hd combo" and everything the fancy one shows the little one is right there with it with the exception of the side finder. My fancy one has GPS and everything else but side finding, but the little 120 one has side finding and that alone is the ticket when it comes to finding fish in the spring. I found it better to buy the 120 w/side finder rather than the fancy one with it built in because you can more control right where you want to look, like a flashlight. This unit will tilt so that you can shine down or up depending on you wishes. Just keep the flashlight theory in mind when using this great unit and you to will be eating or releasing fresh fish.
Comment 33 of 39 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Edition: B&W, Dual Beam Sonar 1000W Verified Purchase
I bought this unit for a trip to Basswood Lake for a rental boat. Fished for 5 days and changed the batteries once after 3 days of almost constant use. Marked fish from 15 to 35 ft trolling, several hits after marking. Bottom detail very good. Sidefinder worked good for casting, when we marked fish, casting in the area usually was sucessful. Easy to use. Bottom line... without a unit like this, you're just guessing.
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