brand new and high quality Features: DY-AP3001 is a high-power mono Bluetooth-compatible audio module.Single channel audio signal output.Built-in amplifier module therefore it can connect to loudspeaker directly.It is for ideal for DIY speakers and transponders. Width work voltage range Applicable multiple type speakers Support enabled/disabled output. Specification: Model: DY-AP3001 Work Voltage:DC 8V-24V Work Mode:Class D Channel:Mono Input:Audio input Output Power: Output power 30W at 16V 4ohm Output power 20W at 12V 4ohm Output power 10W at 12V 8ohm Output power 15W at 16V 8ohm Output power 25W at 24V 8ohm Match speaker(30W~300W): 4ohm at 8V~16V 8ohm at 8V~24V Work Temperature:-40~85 Work Humidity:0%~95%RH Size: 2.2 x 2.6cm (0.87 x 1.02in) Quantity: 1 Pc Note: 1. No retail package. 2. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 4. Amplifier Module only, other accessories demo in the picture is not included. Package includes: 1Pc x Amplifier Module