Description: Bluetooth 5.0 Version: Conforms to version 5.0 specifications, backward compatible with Bluetooth 4.2 / 4.1 / 4.0 / 3.0 / 2.0 / 1.0. Transmitter Receiver: Universal Bluetooth audio adapter can make your sound system have Bluetooth function. Support Bluetooth Hands-free Calling: When in Bluetooth receiving , support incoming call answering/hanging up, etc. Support NFC: Built-in chip, you can directly connect with NFC mobile phone or other Bluetooth devices that support NFC by touching this receiver. Support Dual Audio Ports for Connection: 3.5mm and 2RCA audio ports are included, suitable for more devices (including 3.5mm cables and 2RCA cables). Specification: Size: 78x50x18mm/3.07x1.96x0.70inch Material: Plastic Support two mobile phones to connect Bluetooth 5.0 Output interface: 3.5mm stereo RCA left and right channels Function introduction: U disk, hands-free call, NFC connection Bluetooth protocol: AVRCP, A2DP Frequency range: 2400-2483.5MHz Frequency response: 20Hz-20kHz Output power: 28mW RL=16Ω Signal to noise ratio: ≥90dB Total harmonic distortion: ≤0.1% Support SBC, AAC Forward transmission distance: 10 meters Support Micro USB interface 5V power supply Product size 78x50x18mm/3.07x1.96x0.70inch Type-C, 3.5MM/2 RCA/USB Package Includes: 1x Bluetooth Adapter 1x Audio cable 1x Data cable 1x RCA cable : 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.