Feature: 1. Made of high‑quality materials, easy to install and durable, long service life. 2. Adopt advanced SGS (sound particle synthesis technology) and intelligent state following compensation technology. 3. AUX Channel is supported, which can simulate various auxiliary sounds. The device supports the highest 4S Lipo. When using 3S or 4S, it is recommended to adjust the volume and avoid speaker distortion when working without full load. 4. Supports up to 10 built‑in engine sounds and 5 built‑in alarm sounds, which can be switched freely between different engines. 5. Support intelligent English and Chinese voice prompts, so that the operation becomes easy and free. 6. Support the sound of deflated parking;Brake sound can be freely set on and off, support throttle direction positive and negative Settings. 7. 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. Specification: Condition: 100% Brand New Item Type: RC Engine Sound Simulator Material: Plastic Project type: RC accessories Material: Plastic Color: Black Power Supply Voltage Range: 6.5-16.8V (2S-4SLipo) Support High Voltage Range: 6-14.8V Speaker Impedance: 4 Speaker Power: 5W Size: Approx. 45 x 45 x 44mm / 1.8 x 1.8 x 1.7in Quantity: 1 (set) Fitment: Fit for hsp/ for redcat /for traxxas/ for tamiya/ for hpi / for axial RC Car. Package List: 1 x Sound Simulator 2 x Receiving Cable 1 x T Plug Cable 1 x Manual Note: 1. Please allow 1‑3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.