Designed for use with Fluke ScopeMeter 120-series. The probe connects to the optical port of the ScopeMeter 120, and features isolated external triggering, for measurements that require external triggering or triggering on floating reference signals. Probe length is 1.2m (48"). The probe includes a hook clip with ground lead, and a 9-Volt Alkaline battery. Input impedance: 10MO in parallel with 15pF. Trigger level: TTL compatible (High equals to 2V, Low equals to 0.8V). Minimum pulse width: 7 micro seconds. Maximum frequency: 50 kHz. Maximum signal voltage: 600 Vrms, CAT II per IEC1010-2-031. Maximum voltage to ground: 600 Vrms, CAT II per IEC1010-2-031. Battery type: Alkaline 9 volt, NEDA, IEC6LR61. Battery life: 60 hours.