Item Type: Bluetooth Decoder Board Material: PCB Color: As shown in the picture Product Model: XY-WRBT Working Voltage: 3.7~24VDC Bluetooth Version: 5.0 Transmission Distance: 15 meters (visible without obstruction) Signal to Noise Ratio: 90dB Distortion: -70dB Number of Channels: Dual channel (stereo) Audio Interface: 3.5mm audio interface Module Protection Mechanism: Power reverse connection protection Remote Control Battery: CR2025 button battery (not included)1Bluetooth 5.0 version, the transmission is so simple and fast, the signal is more stable. 2With a remote control, it is easy to control, and makes the operation simple and convenient. 3Module protection mechanism, with power reverse connection protection. 4Dual?channel output, compatible with most power amplifiers and other equipment in the market. 5Made of high?quality electronic component materials, stable and reliable performance. 1 x Bluetooth Decoder Board 1 x Remote Control(Battery Not Included)