Features 1.BLUETOOTH TRANSMITTER RECEIVER: Bluetooth HiFi sound adapter can stream music via Bluetooth from your phone, computer or tablet to any of your home stereo systems. Can also stream music from TV, computer, projector, amplifier to Bluetooth headphones or speakers, plug and play. 2.NFC FUNCTION: Bluetooth 5.1 sound receiver transmitter has NFC function, one touch cell phone connection, NFC enabled cell phone devices can be connected by tapping the Bluetooth transmitter and receiver, convenient and fast. 3.HIGH COMPATIBILITY: Bluetooth sound receiver transmitter utilizes an advanced 5.1 chip to ensure a fast and stable Bluetooth connection. Supports AUX, RCA, USB flash drive, memory card for music playback, providing powerful compatibility for your daily music experience. 4.HIFI STEREO SOUND: The proven Bluetooth 5.1 chipset is an advanced solution that delivers wireless sound performance, ensures HiFi sound signals for streaming music to your home stereo system, and supports SBC decoding. 5.EASY TO USE: Driver free, paired playback, it also supports remote control to adjust volume up and down, up and down tracks, and connect channels. Built in 500mAh lithium polymer battery, supports charging while using, about 15 hours of listening time on battery power. specificationItem Type: Bluetooth 5.1 Sound Receiver Transmitter Material: ABS Product Model: D6 Bluetooth Version: V5.1 Sound Decoding: SBC Bluetooth Protocol Support: A2DP AVRCP File Format: MP3 WAV WMA FLAC APE Frequency Range: 2400MHz-2483.5MHz Frequency Response: 20Hz-20KHz Output Load: 16-320 Adaptive Transmission Distance: Approx. 10-30m / 32.8-98.4ft (Open Place) Sound Input: Bluetooth Sound, U Disk, AUX, RCA Output: AUX RCA Memory Card: Support Up To 32GB Memory Card (Not Included) Battery Capacity: 500mAh Lithium Battery (Included) Remote Control Battery: CR2025 x 1 (Not Included) Power Supply Interface: USB C 5V Compatibility: For Android System, For IOS System Of Cell Phones, Tablets, TVs, Game Consoles And Other Bluetooth Devices, And Sound Devices With Sound Input Interface Size: Approx. 90 x 58 x 22mm / 3.5 x 2.3 x 0.9in PackageList1 x Bluetooth 5.1 Sound Receiver Transmitter 1 x Remote Control 1 x Charging Cable 1 x RCA Cable 1 x AUX Cable 1 x User Manual NotePlease allow some error due to manual measurement.