1、BLS‑B20 is a home wireless audio receiver with dual interface audio output, supports memory card/U disk to play hands‑free calls. 2、NFC connection adopts industrial‑grade power isolation module to solve noise interference perfectly. 3、Connect your speakers (3.5 or for RCA) via the (3.5 or for RCA) audio interface to instantly turn your ordinary speakers into wireless speakers. 4、It is small and lightweight, fashionable, easy and convenient to operate, a good music receiver choice. 5、Pairing with the product through a wireless device (mobile phone, tablet, etc.) allows you to enjoy the music at any time. Condition: Item Type: Music Receiver Material: ABS Color: As Picture Shown Weight: Approx. 139.0g/4.9oz Model: BLS-B20 Equipment: Support two mobile phones to connect Device Version: 5.0 Output Interface: 3.5mm Stereo for RCA left and right channels Function introduction: Memory card, U disk, hands-free call, NFC connection Device Protocol: AVRCP, A2DP Frequency Range: 2400mhz-2483.5mhz Frequency Response: 20hz-20khz Output Power: 28mW Return Loss=16Ω Forward Transmission Distance: 10m/32.8ft Interface: USB 1 x Receiver 1 x Charging Cable 1 x 3 in 1 Line 1 x 3.5MM Connection Cable Note: 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.