Note: Please allow some error due to manual measurement. Specification: Item Type: Bluetooth 5.1 Sound Receiver Transmitter_x000D_Material: ABS_x000D_Product Model: D6_x000D_Bluetooth Version: V5.1_x000D_Sound Decoding: SBC_x000D_Bluetooth Protocol Support: A2DP AVRCP_x000D_File Format: MP3 WAV WMA FLAC APE_x000D_Frequency Range: 2400MHz-2483.5MHz_x000D_Frequency Response: 20Hz-20KHz_x000D_Output Load: 16-320 Adaptive_x000D_Transmission Distance: Approx. 10-30m / 32.8-98.4ft (Open Place)_x000D_Sound Input: Bluetooth Sound, U Disk, AUX, RCA_x000D_Output: AUX RCA_x000D_Memory Card: Support Up To 32GB Memory Card (Not Included)_x000D_Battery Capacity: 500mAh Lithium Battery (Included)_x000D_Remote Control Battery: CR2025 x 1 (Not Included)_x000D_Power Supply Interface: USB C 5V_x000D_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_x000D_Size: Approx. 90 x 58 x 22mm / 3.5 x 2.3 x 0.9in Features: 1BLUETOOTH 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. 2NFC 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. 3HIGH 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. 4HIFI 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. 5EASY 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. PackageList: 1 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