Model: ZK-502MT Bluetooth compatible version: 5.0 (no occlusion, 15m) Signal-to-noise ratio: >90dB Input method: AUX+Bluetooth compatible Number of channels: left and right dual channels (stereo) Power amplifier chip: domestic power amplifier chip Adaptive power supply: DC9~24V/3A or more (24V battery pack cannot be connected) Adapter speaker: 15~100W, 4~8Q