ITEM NAME:TPA3110 2x15W Bluetooth Audio Power Amplifier Board for Bluetooth Speaker #JT1 Product Description Description: Feature: Sound quality is very good by using this module. Wireless Bluetooth audio input and the Max. receiving distance is 10m. Dual channel of 15W+15W power output. Applicable speaker impedance: 4/6/8/10 ohm. Specification: Audio Input: Wireless Bluetooth Max. Receiving Distance: >10m Power Output: Dual-channel 15W+15W Applicable Speaker Impedance: 4/6/8/10 ohm Supply Voltage: DC 10-25V(recommended More than DC 12V 2A ) Power Supply Interface: 2.54*3PIN Speaker Interface: 2.54*2PIN Size: approx. 50*38*10mm/1.96*1.49*0.39'' Gross weight: approx. 14g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 1 x Bluetooth Audio Power Amplifier Board for Bluetooth Speaker.Included: 1 x Bluetooth Audio Power Amplifier Board for Bluetooth Speaker. Wireless Bluetooth audio input and the Max. receiving distance is 10m. Audio Input: Wireless Bluetooth. Applicable speaker impedance: 4/6/8/10 ohm.