Description: The built-in chip allows you to touch this receiver to directly connect to NFC-enabled mobile phones or other bluetooth devices. By connecting a USB or 3.5mm audio interface to 2RCA, you can listen to music wirelessly on two speakers. It is made of ABS material. The length of the product is 109mm, the width is 73mm, and the height is 29mm. It is suitable for all bluetooth audio devices, NFC available devices. Item Name: bluetooth-compatible Receiver Material:ABS Interface Type: RCA / AUX / USB Frequency Range: 10Hz-20kHz Impedance: 75 Bluetooth Protocol Support: A2DP / AVRCP Backward Compatible: 4.2 / 4.1 / bluetooth-compatible 4.0 / 3.0 / 2.0 / 1.0 Bluetooth Version: V5.0 EDR Signal to Noise Ratio: > 110dB Bluetooth Distance: Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes: 1 X bluetooth-compatible Receiver 1 X Micro USB Charging Cable 1 X 3.5mm to RCA Cable 1 X 3.5mm Audio Cable