The SKYRC engine heater uses technology similar to that used by Formula 1, Indy Car and NASCAR Teams! It will properly pre-heat your engine to 60-70C in 10 minutes based on ambient temperature. It will pre-heat all the critical parts of your nitro engine, giving you a minimal of stress and wear on the engine. Features: Small, lightweight and compact Fits all 19-26 RC nitro engines 12V DC source with low voltage cut-off LED indicator for status of engine heater Fireproof and heat resistant adjustable cover It's designed to transfer heat effectively and efficiently Safety time: turn off power around 10 minutes automatically MCU control heating time and heating power for maximum safety Built-in temperature sensor: to control the output power of the heater Access port on top allows you to start and monitor your engines temperatures without having to take the heater off Specifications: Brand: SKYRC Input Voltage: DC 12V Heating Power: 90W Heating Time: Around 10 minutes Low Voltage Cutoff: 9-10V LED Indicator: Heating (Red LED Stays On) Low Voltage (Red LED Blinking) Net Weight: 69g Dimension: 65 * 53mm Warning: Never have power on the heater, if it is not mounted on the engine, it can overheated. Package Information: Package size: 11 * 8.5 * 6cm / 4.3 * 3.3 * 2.4in Package weight: 122g / 4.3oz Brand gift box package Package List: 1 * SKYRC Engine Heater 1 * XT60 DC Wire 1 * English Mannual