HF69B Power Amplifier Board Speaker Modified Board 2x6W Compatible with Bluetooth

Feature: 1. Small standby heating, good-quality stereo, suitable for bluetooth speakers. 2. Output power 6W+6W, two-channel stereo, good sound quality. 3. Lithium battery can be connected, with management. 4. When using a lithium battery, the charging interface can be charged with a 5 volt power supply or a mobile phone charger to a single-cell lithium battery. 5. The management circuit limits the battery to a maximum voltage of 4.2VDC. Specification: Item Type: Amplifier Board Model: HF69B Supply Voltage: 5VDC or 3.7V lithium battery Applicable Speaker Impedance: 4 ohms, 6 ohms, 8 ohms Charging Interface: When using a lithium battery, the charging interface can be charged with a 5 volt power supply or a mobile phone charger to a single lithium battery. (The management circuit limits the battery to a maximum voltage of 4.2VDC) Uses: Suitable for bluetooth speakers Package List: 1 x Amplifier Board Note: When the slide switch is ON, the USB port is the charging port, which can be operated by the lithium battery. When the slide switch is OFF, the USB port is the power supply port, which can work without the lithium battery.