1. Bluetooth audio power amplifier module with tone 2. adjustment of treble and bass 3. Bluetooth + AUX audio input 4. 2.0 channel stereo output 5. An external antenna can be connected, but the antenna need purchased by yourself. This model is an upgraded version and supports "Wuzhi Audio" APP control 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. Product Parameters: Product Name:100Wx2 BT audio amplifier module Product Model:-1002MT BT Version:5.0 (no shielding,15m) SNR: 90 dB Audio Input:AUX+BT Channel:2.0(stereo) Power Supply:DC 12~24 V / 5A or above (Do not connect to 24 V battery pack) Adapter Speaker: 30~200 W,4~8 Ω Power supply voltage:12V-8Ω/20W+20W,4Ω/35W+35W 19V-8Ω/35W+35W,4Ω/60W+60W 24V-8Ω/50W+50W,4Ω/100W+100W Protection mechanism: Overheat,Overcurrent, short circuit protection PS:In the audio input is enough,the supply voltage/current is enough, there be enough output power! The higher the supply voltage,the greater the output power.The smaller the impedance of the speaker,the greater the output power! Please that the power of the adaptor is the actual working power of the amplifier! Material:PCB+electronic components+metal colour:Black Package Contents: 1 amplifier module 1 x Enclosure kit with mounting accessories 1 x Adapter 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.