This is a Rapid Heat Glo-Starter with Battery Charger. This is used to heat glow plugs while starting glow-powered engines. Proven Twist and Lock Connector ensures a secure, solid connection that won't come off, providing safer, faster starts for your model. Pre-Installed Genuine Sanyo Sub-C battery cell. Included AC battery charger with nut-shaped charge end recharges the glow starter in 10 hours. A Red LED light glows when charger is charging. Removable Black rubber socket cap prevents shorting and any dirt or dust debris from entering into the the shaft. One Year Limited Warranty USA and Canada only One Rapid Heat Glo-Starter w/Black Rubber Protective Cap One Rapid Heat Glo-Starter Battery Charger One Instruction/Header Card Sanyo Sub-C NiCd Battery: 1500mAh, 1.2V AC Charger- Input: 110-120V AC 60Hz (US Standard) Output: 1.25V DC 150mA Rapid Heat- Overall Length: 4" (102mm) Shaft Length: 1¾" (44mm) Diameter: 15/16" (24mm) How to use: To lock onto your engine's glow plug, place the end of the Rapid Heat over the plug and push down. Twist the Rapid Heat clockwise and it locks into place. Charging: Before using, initial charge should be 12 to 14 hours. Subsequent charging time is approximately 10 hours. JAL 4/19/00 ir/jl &