Description: Bluetooth 5.0: Enjoy seamless connectivity with the latest Bluetooth 5.0 technology, ensuring stable and fast transmission of audio signals. Dual 50W Amplifiers: Experience powerful and immersive sound with two 50W amplifiers, delivering high-quality audio for both channels. 100W Total Power: Feel the of your music with a total power output of 100W, providing clear and dynamic sound across all frequencies. TPA3116D2 Chip: The TPA3116D2 chip ensures superior sound quality and stability, making it an Perfect choice for high-performance audio systems. This model is an upgraded version and supports "Wuzhi Audio" APP control. : Model: -TB21 Bluetooth Version: 5.0(no shielding, 10m) Input sensitivity: 500mV Audio Input: AUX + Bluetooth 5.0 Channels: 2.1 Chip: TPA3116D2(with AM anti-interference function) Power: DC12-24V/More than 5A (the higher the voltage, the greater the output power) Adapted speakers: 20-100w, 4-8Ω Output power: Max.50W(R and L channel), Max.100W(subwoofer) Max Output Power: 2x50W+100W Protection Mechanism overvoltage, undervoltage, overhearing, DC detection, short circuit protection. Wuzhi Audio APP download link for Android phones: http: //.qingdaowuzhi.cn/appdownload/Wuzhi_Audio.apk For iOS phones, please search "wuzhi audio" in the to download and install it. Material: PCB+electronic components+metal colour: Black Package Contents: 1 amplifier module 1 x case kit 1 x screwdriver(The shell needs to be assembled by yourself, the screwdriver color is random, Cannot be chosen the specific color.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.