This is the Opto-Isolated E-Switch with Hitec/JR/Z connector. This is a Solid-State Replacement for a Servo and Switch combined. FEATURES: Adjustable ON point, reversing switch and LED indicator. Optically isolated for no radio noise problems. Use as "Old Timer" ignition cut-off, Glo driver switch, Smoke pump control, or an On-Board Starter. High Current Switching Capability Selectable Stick Direction of ON/OFF Positive Switching Point with Hysteresis for No Switch Center Load Power Automatically Turns off when Receiver Power is Turned OFF. Works with AM, FM, and PCM radios. INCLUDES: One Opto-Isolated E-Switch with Hitec/JR/Z connector. One 6-1/2" piece of solder. REQUIRES: Soldering wires with included instructions. SPECS: Length: 1.47" (37.5mm) Width: 1.56" (39.6mm) Height: .75" (19.1mm) Weight: .7 oz (20g) ir/kh