Description: - Product model: HF69B - Bluetooth power amplifier board, low standby power, good stereo sound quality, suitable for small bluetooth speakers - Output power: 6W+6W two-channel stereo - Applicable speaker impedance: 4 ohms, 6 ohms, 8 ohms - Supply voltage: 5VDC or 3.7 volt lithium battery - Charging interface: 5 volt power supply or mobile phone charger can charge single-cell lithium battery when using lithium battery (the charge management circuit limits the maximum voltage of the battery to 4.2VDC) Specification: Product Size: approx. 70x40x8mm/2.76x1.57x0.31inch Package Includes: 1Piece bluetooth audio amplifier board Note: When the slide switch is ON, the Micro USB port is the charging port, which can be operated by the lithium battery. When the slide switch is OFF, the Micro USB port is the power supply port, which can work without the lithium battery
