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 (5 or for RCA) via the (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. 1 x Receiver1 x Charging Cable1 x 3 in 1 Line1 x 3.5MM Connection Cable Condition: 100% Brand NewItem Type: Music ReceiverMaterial: ABSColor: As Picture ShownWeight: Approx. 139.0g/ 4.9ozModel: BLS-B20Equipment: Support two mobile phones to connectDevice Version: 5.0Output Interface: 3.5mm Stereo for RCA left and right channelsFunction introduction: Memory card, U disk, hands-free call, NFC connectionDevice Protocol: AVRCP, A2DPFrequency Range: 2400mhz- 2483.5mhzFrequency Response: 20hz-20khzOutput Power: 28mW Return Loss=16ΩForward Transmission Distance: 10m/ 32.8ftInterface: USB