Terminal Shutter Interlock Mechanism Prevents Wrong Operations 11 Functions Heavy Duty Rubber Holster Data Hold, Auto Power Off Measurement of Duty, Ignition Frequency, Ms - Pulse Width, RPM & DWELL Â Â Features: Â Ignition Frequency 0.1 Hz ~ 20 KHz Pulse Width 0.1 ~ 999.9 msÂmore...