Features 1、True Wireless Stereo Mode: Easily separate left and right channels with the box pairing feature, enhancing your music or movie experience without any wired connections. Amplifier module delivers optimal sound for your private sound and video space. 2、Light Indicators: Two indicators provide clear status information, the work indicator shows if the module is running normally, while the true wireless stereo indicator signals true wireless stereo mode for convenient control. Simplifying module use and optimal music enjoyment. 3、Knob Function: The amplifier module features a multifunctional knob for volume adjustment, sound playback pause, and the coming music selection. Power on off with long press, true wireless stereo mode with triple press, offering a smoothly and comfortable knob performance for easy access to all functions. 4、4 Inputs: Equipped with 4 inputs, BT, AUX, USB flash drive, and USB sound card. Easily connect wirelessly via BT, or through AUX input to your TV, computer, or sound device. Support for USB flash drive and USB sound card input allows seamless playback of music files or computer sound for a premium sound experience. 5、Wide Applications: With true wireless stereo capability, this powerful sound device is ideal for sound and other areas. Delivering excellent sound quality for optimal music and movie experience at home or in the office. Easy to install and use, a practical choice for music enthusiasts and casual users alike. Specification Item Type: Sound Amplifier Module Material: ABS Channels: Single Channel 100W Input Method: AUX, BT, USB Input Sensitivity: 500mV BT Version: 5.1 (Approx. 10m / 32.81ft without obstruction) Amplifier Chip: TPA3116D2 Compatible Speakers: 20-100W 3-8Ω Compatible Power Supply: DC 7-24V Safety Mechanism: Under Voltage, Over Voltage, Overheat, DC Detection, Short Circuit Safety Output Power: ≤100W Voltage Gain: 30dB Size: Approx. 89x45x20mm / 3.50x1.77x0.79in Package List 1 x PCB Top Cover 1 x PCB Board 1 x Knob Hat 1 x PCB Bottom Cover 4 x M2 x 14 Brass Pillar 8 x M2 x 3 Screw 4 x M2 x 3 Brass Pillar 1 x Screwdriver 1 x Adapter 1 x Heat Sink 1 x User Manual