Parameter: 1. Audio Input: Wireless Bluetooth 2. Max. Receiving Distance: 10 Meter 3. Power Output: Dual-channel 15W+15W 4. Applicable Speaker Impedance: 4/6/8/10 ohm 5. Supply Voltage: DC 10~25 V (recommended DC 12V More than 2A) 6. Power Supply Interface: 2.54 mm x 3PIN 7. Speaker Interface: 2.54 mm x 2PIN 8. Size (L*W*H):58 x 38 x 10 mm Feature: 1. Dual channel of 15W+15W power output. 2. Sound quality is very good by using this module. 3. Wireless Bluetooth audio input & the Max. receiving distance is 10 M. Package included: 1 x TPA3110 2x 15W Bluetooth Audio Power Amplifier Board