SkyRC Nitro Engine Heater w/LiPo Low votage Cutoff Protection, 12VDC Powered Will pre-heat your nitro motor to 60-70 degrees (depending on ambient temperature) within 10 minutes. Has LED status indicator lights and built-in temperature sensor to automatically monitor heat and has a safety timer to automatically turn off after 10 minutes. It can be powered by a 3S 11.1V LiPo battery or DC power supply, features voltage cutoff feature to prevent the over discharge of your LiPo battery. Access port on top allows easy access to the glow plug while the heater is on and allows you to monitor your engine's temperatures without having to take the heater off. Fireproof and heat resistant adjustable cover Fits all .19-.26 RC nitro engines. Very small, lightweight and compact for quick and easy storage. Designed to transfer heat effectively and efficiently.