Features: 1. Connect 2 speakers simultaneously 3.5mm and 2RCA connection options. Connect your NFC-enabled device to your NFC-enabled smartphone or tablet with a single touch. 2.Wide compatibility Stream audio wirelessly from Bluetooth-enabled devices.Hi-Fi music 5 equalisation modes, press the appropriate button on the receiver to select your preferred equaliser mode 3. Bass-heavy 3D surround sound with 3D button for one-touch control.Upgrade your old wired speakers, low signal delay, enjoy pure home stereo music 4.Turn your old speakers into Bluetooth speakers with remote control from your mobile phone. 5.Multi-function jack for RCA and AUX connection, Type-C for power supply Specifications: Type: Standard Bluetooth version: Bluetooth 5.2 Sound quality: High quality Audio code: SBC/AAC SBC/AAC Bluetooth protocol: AVRCP/A2DP AVRCP/A2DP Operating range: approx. 10 metres Ports: 3.5mm + 2RCA Frequency Response: 20HZ-22KHZ Material: abs colour: black Package Contents: 1 x Bluetooth receiver 1 x 3.5mm audio cable 1 x RCA audio cable 1 x Power cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.