You can set 5 syles sound mode for your RC car to create a realistic racing environment. and it can install in most RC cars as it has a small size to fit in.<br/>Featuresandxff1a;<br />Advances SGS (Sound Particle Synthesis Technology) and SFC (intelligent State-following compensation technology) are adopted.<br />10 engine sound and 5 alarms are supported.<br />Support brake sound and exhaust valve sound; And brake sound can be set to ON/Off freely.<br />Standby mode supported it standby with no radio operation in 60 seconds. Move the throttle to wake it up.<br />Low-voltage protection is supported, and battery types(2S-4S Lipo) are automatically detected when powered up.<br/>Specification:<br />item name: Model Sound Simulator<br />Input Voltage: 6.5-16.8 V (2S-4S Lipo)<br />Speaker Power: 5W<br />Speaker impedance: 4<br />Mono model size: 46 x 46 x 42 mm<br />Dualmodel size: 81 x 52 x 42mm<br />Package size:<br />Mono mode 73 x 71 x 58 mm<br />Dual model 105 x 75 x 56 mm<br />Mono model weight: 113 g<br />Dual model weight: 169 g<br/>Note: There could be a few deviations due to manual measurement or slightly color difference as the result of the shooting scene. Thank you for your understanding.<br/>Package Listing:<br />1 x RC Car Engine Sound Simulator<br />3 x Adapter Cables<br />1 x User Manual<br/>