4 Ohms 3W Mono Bluetooth Power Amplifier 3.7V Lithium Battery Bluetooth Module Diy Wireless Speaker Bt Amplifier Board

Product parameters: Interface: Micro USB, Type C Input voltage: 3.7V lithium battery (note: only lithium battery power is supported, USB can only be charged) Working voltage: 3.3V -5V Output power: 4 omega 3W Product size: 4cm * 2.1cm Kind reminder: *Please confirm whether this circuit board meets your needs before purchasing *This link only has boards and is shipped without speakers, cables, and power supplies, *The standard configuration of the speaker is 4 ohms and 3W, and it can also be connected to 4 ohms and 5W, 8 ohms and 3W, and 5W. The volume level is not required *The circuit board can be connected to only one speaker without distinguishing between positive and negative signals *Avoid installing in a metal sealed space, as it may affect Bluetooth signal reception and cause intermittent or silent sound *When wiring the power supply, pay attention to the positive and negative poles, and use them within the calibrated voltage range. Misconnection and high voltage can burn the board Product List: 1X module The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.