1、Bluetooth 5.0 Stereo Power Amplifier Board: 2 channel stereo vocal receiver amplifier board, with good transmission effect and high stability. 2、With Button Control: You can control the up and down music, volume increase and decrease, play, pause, switch machine, etc. 3、Product Use: It can receive Bluetooth vocal signals from mobile phones, laptops, and tablets to stereo power amplifier output through this Bluetooth. 4、Vocal Interface: It can be connected to an ordinary headset with a 3.5mm interface, which can be turned into a Bluetooth headset (without mic function). 5、Note for Use: The speaker output port and the headphone jack cannot be used at the same time; try not to get close to metal parts. Item Type: Bluetooth Stereo Power Amplifier Board Material: PCB Vocal Input: Bluetooth Vocal Receiver Bluetooth Version: 5.0 Bluetooth Name: JH-BT Maximum Receiving Distance: More Than 10m / 32.8ft Power Output: Stereo 2x5W Output Mode: AB Type/D Type Can Be Selected Drive Speaker Impedance: 2-4-8 ohm Speaker Speaker Power Supply Interface: Micro USB 5V DC (Recommended 5V/3A, If 5V/2A Power Supply is Used, Because the Peak Working Current in D Mode is Large, It Needs to be Switched to AB Mode, It Is Recommended to Play More Power in 5V/3A D Mode Big) Headphone Output Interface: 3.5mm Stereo Speaker Output Interface: 2x2PIN / 5mm Pitch (Can not be Output to Power Amplifier) Speaker: 2-8 ohm 5-10W Speakers Can be Connected Respectively, 4 ohm 10W Speakers are Recommended. Signal to Noise Ratio: 90DB THD+N: -70DB Crosstalk: -86db DNR: 91db Transmission Protocol: A2DP/AVCTP/AVDTP/HFP Installation: When installing the Bluetooth board, try not to place the Bluetooth antenna close to metal parts, so as not to affect the transmission distance. 1 x Bluetooth Stereo Power Amplifier Board