DC 5V 3.7V 6W + 6W Stereo Bluetooth Receiver Amplifier Board Lithium Battery Powered
$7.89
Output power: 6W + 6WApplicable Speaker Impedance: 4Ω 6Ω 8ΩPower supply voltage: DC 5V or 3.7V lithium batteryCharging interface: When using the lithium battery as power supply,the charging interface is DC 5V power supply or cell phone charger can charge a single lithium battery (The charge management circuit limits the maximum voltage to the battery is 4.2V DC)
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