Our most popular timer can be used to replace older electrical and mechanical timers found in many models of battery chargers. A cost-effective retro-fit to replace more expensive OEM timers. Designed to be easy to install through a 3/8" stem-mounting hole. Wire terminals use .250" industry-standard solderless push-on connectors. No AC power is required to run this timer. No specialty tools required. When oriented with the "OFF" position at 12 o'clock, timer has a "HOLD" position (constant ON) when rotated counterclockwise to the 11 o'clock position. Otherwise, when rotated clockwise to a set position, it will countdown back to the OFF position at 12 o'clock. >>>Features 120 Minute duration, with "HOLD" position. Mounts in 3/8" panel hole with included panel nut and lock washer. Straightforward instructions and simple design allows easy installation. No special tools are required. >>>Specifications .250" Push-on connectors. Switched Current Rating 13A/120VAC, 16A/250VAC Timer body - 1.71"H x 1.85"W x 1.04"D Stem - .70"L x 6MM (.236") Diameter >>>Contents 120 minute timer with "HOLD" position. Skirted knob with metal insert. Mounting fasteners & hardware. Laminated 120 minute Dial Label. Instruction sheet.