Features 1、It has good sound quality, suitable for upgrading and modifying idle speakers and DIY production. 2、The operation is simple and use high quality material to effectively avoid corrosion and wear, it is durable. 3、Wide range of application, Bluetooth version 4.2, it is compatible with all mobile phones and Bluetooth adapters on the market. 4、The Bluetooth audio receiver board already has dual 5W power amplifier circuit, which does not need to connect additional power amplifier. 5、The maximum operating current is 5V2A, powered by a regulated 5V2A or higher, the sound quality is better. Specification Item Type: Bluetooth Amplifier Board Maximum Operating Current: 5V2A (Powered by a regulated 5V2A or higher, the sound quality is better.) Speaker: 2-8 ohms, 3-10W (It is recommended to use 4 ohm 5W or 4 ohm 10W speaker. The output is stereo.) Bluetooth Version: 4.2 Product Size: Approx. 40 x 20 mm / 1.6 x 0.8 in Operation: Start the cell phone Bluetooth, scan the device and find the ''DW-CT14+'' to click connection. Package List 1 x 3.7-5V Dual Plate Amplifier Board DIY Bluetooth Speaker Modification Module 3 x Flat Cable