Check other web sites for "NS Micro Tuner just flashes" it's garbage. I replaced the battery and it still doesn't come up. Made sure to not have to Metronome on etc, and no go. it just flashes and flashes. I wish hadn't trusted the reviews on Amazon for this product and instead looked elsewhere. This is the second garbage item I've bought from D'Addario, and will never purchase anything from them again. The planet waves cable I bought from them was broken right out of the box. They used to be a good company, not sure what happen, probably moved all their manufacturing to China and now this it the low quality garbage they'll be remembered for. good job.