TheEngine Simulated Sound Module is specially designed for1/10 RC Crawler Off-road Car Features: Lightweight, Mini size. Easy to install and operate It is specially tailored for 1/10 RC Crawler Off-road Car Built-in higher efficiency amplifier, lower power consumption and more power saving Equipped with 58 different sound effects from engine, brake, reverse car to danger alarm You can freely set what you want through software parameters like throttle response time, braking time, sound volume Any problem, please contact our store without hesitation. Honor to serve you Specification: Power Amplifier: Input Voltage: 7-25V Max. current: 2A Controller Connecting Line: Input Voltage: 4.8-5.0V Max.Current: 0.5A Audio Output Power: Max.10W Sound Box Size: 80 * 45 * 30mm Wire Length 20cm JST connector Package Information: Package Size: 12 * 6 * 4cm / 4.58 * 2.34 * 1.54in Package Weight: 183g Gift box Package Package List: 1 *Engine Simulated Sound Box 1 * Cable Set 1 * Manual