Double Speaker Feature: -- Made of high?quality materials, easy to install and durable, long service life. -- AUX Channel is supported, which can simulate various auxiliary sounds. -- Supports up to 10 built?in engine sounds and 5 built?in alarm sounds, which can be switched freely between different engines. -- Support intelligent English and Chinese voice prompts, so that the operation becomes easy and free. -- Support the sound of deflated parking;Brake sound can be freely set on and off, support throttle direction positive and negative Settings. -- Support standby state, enter standby when remote control is not operated within 60 seconds, gently tap the throttle to start, support low voltage protection, and automatically detect the battery type. Specifications: Type: Sound Simulator RC Accessories Material: Plastic Color: Black Speaker Impedance: 4 Speaker Power: 5W Dual Speaker Size: 46*46*82mm Package Included: 1 x Sound Simulator 2 x Receiving Cable 1 x T Plug Cable 1 x Manual Monaural Features: -- Monophonic output. -- SFC (intelligent state following compensation technology) sound more real. -- Support AUX channel, can simulate a variety of auxiliary sound. -- Can simulate all kinds of alarm horn sound. -- Supports up to 10 built-in engine sounds and 5 built-in alarm sounds, which can be switched freely between different engines. -- Support the sound of shutdown exhaust valve; Brake sound can be set freely on and off. -- Support throttle direction positive and negative Settings. -- Support standby state, enter standby when remote control is not operated within 60 seconds, -- gently touch the accelerator to start. -- Support low voltage protection, automatically detect battery type when power on. Specifications: Type: Sound Simulator RC Accessories Material: Plastic Color: Balck Speaker Power: 5W Speaker impedanece: 4 Mono model size: 46*46*42mm Package Included: 1 * Engine Simulated Sound Box 1 * Cable Set 1 * Manual