3.7V 3W 4ohm Mono Bluetooth Power Amplifier Board Lithium Battery Powered Bluetooth Module

Features:1.Micro USB and Type C 2 interfaces are optional, and can be connected to 4Ω 3W-5W external speakers2. Stable performance, strong signal reception, sight-line distance of more than 10 meters3. The input voltage supports 3.7V lithium battery4. Three-in-one function of Bluetooth, power amplifier, and lithium battery charging, it can be used after connecting the power supply and speaker, small space but big use5. Wide range of applications, suitable for Bluetooth audio, toys, maage chairs, household appliances, electric vehicles, lighting, photovoltaic products, fitne equipment, etc.Product s:Interface: Micro USB, Type CInput voltage: 3.7V lithium battery (Note: only support lithium battery power supply, USB can only be used for charging)Operating voltage: 3.3V - 5VOutput power: 4Ω 3WProduct size: 4cm*2.1cmReminder:* Please confirm whether this circuit board meets your needs before purchasing* This link only has the board, the speaker, wire and power supply are not included in the shipment,* The standard configuration of the speaker is 4 ohW, and it can also be connected to 4 5W, 8 ohW, 5W, the volume will not be used* The circuit board is only connected to one speaker, so it can be regardle of positive and negative* Avoid installing in a metal-sealed space, which will affect the Bluetooth signal reception and cause intermittent or silent sound* Pay attention to the positive and negative poles when wiring the power supply. Please use it within the calibrated voltage range. Wrong connection or exceive voltage will the boardProduct List:1X module