The appearance of the product is exquisite.Using Bluetooth 5.0 chip design, the compatibility and stability are stronger.Bluetooth receiving (RX), Bluetooth transmitting (TX) two-in-one design.Support USB (U disk), play and launch.Cool breathing light, red/blue color, soft and not dazzling.The product connection is simple, without any driver and no need to download APP;Product name: K5 Bluetooth 5.0 Receiver and TransmitterModel: K5Bluetooth version: Bluetooth V5.0Supported protocols: RX: A2DP AVRC TX: A2DPSupported formats: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTYWorking frequency band: 2.402GHz -2.480GHzPower class: power class 2 (Class II)Sensitivity: -85dBm Less than 0.1%BERSignal-to-noise ratio: greater than equal 90dBDistortion: less than equal 0.1%Interface Type: Input: 3.5mm AUX; Output: 3.5mm AUXWorking current: Less than 40mACharging current: AC 100-240V 50/60HzBluetooth distance: less than equal 10M-15M (open space)Compatible devices: Android, IOS system mobile phones and PADs, active speakers, power amplifiers and Bluetooth speakers or headphones that support A2DP/protocol connectionPlug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so onColour:blackMaterial:ABSSize:65 x 42 x 28mmPackage Contents:1 x Bluetooth adapter1 x 3.5mm AUX audio cableOnly the above package content, other products are not included.Note: Light 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.