Note: This product is a receiver only, not a transmitter. Specification: Item Type: NFC Bluetooth Audio Receiver_x000D_Material: ABS_x000D_Bluetooth Version: V5.0_x000D_Bluetooth Protocol: A2DP / AVRCP_x000D_Effective Distance: Approx.15m / 49.2ft_x000D_Interface: RCA / AUX / USB_x000D_Frequency Range: 10Hz-20kHz_x000D_Signal to Noise Ratio: > 110dB_x000D_Impedance: 75_x000D_Support Short?Distance Wireless Connection Function Features: 1Through the Bluetooth audio receiver, the wired speakers can be transformed into wireless speakers in seconds, making it easy for home speakers to play music. 2It has a Bluetooth 5.0 chip, which ensures that high?fidelity wireless audio signals will stream music to speakers or home stereo systems that do not have this feature. 3Turn non?wireless devices into wireless devices through Bluetooth audio receivers, which are easy to insert, pair and play, allowing you to enjoy high?quality music while playing. 4Plug into computer speakers or other speaker systems via 3.5 mm or RCA cables, and then pair with Bluetooth audio devices such as smartphones or tablets for easy use. 5Support short?distance wireless connection, built?in chip, support touch connection of mobile phone device without manual connection, simple and convenient, flexible operation. PackageList: 1 x Bluetooth Receiver 1 x Charging Cable 1 x 3.5mm Audio Cable 1 x RCA Line 1 x Manual