XH-A150 PAM8403 bluetooth Amplifier Audio Board 5W*2 Lithium Battery Singing Machine USB TF-Card Dua

Product parameters:
Product Name: bluetooth Digital Power Amplifier Board Product model: XH-A150 Chip model: PAM8403 Transmission distance: up to 20 meters (no blocking) Supply voltage: 5V (Micro input) Number of channels: 2 Maximum power: 5W+5W Product net weight: 42g Product size: 99*64*24mm (without protruding parts) ? Instructions for use:
1. Install the TR18650 battery first, pay attention to the positive and negative points! (Battery is not included) 2. Two wire link audio speakers, red is positive, black is negative 3. Insert an SD card with song files in the SD card slot or a USB flash drive with song files inserted in the USB interface. 4. Open the open key, it will automatically read your SD card or USB flash drive, and start playing songs. If the SD card and USB flash drive are installed at the same time, it will read the SD card file and play it by default.
Package included:
1 x Amplifier? 1 x 2Pin Connection line