Fangrui Product Details Music Format: Mp3/ape/flac/wav/wma/alac/m4a Bluetooth Protocol: Hfp/a2dp/avrcp Usb Flash Drive Format: Fat12/fat16/fat32/exfat Specification Core Functions: Rx Receive/tx Transmit/fm Transmitter/usb U-disk Play/led Digital Display/rgb Color Lights Usage: Driver-free, Plug-and-play Product Name:rgb Bluetooth Fm Wireless Audio Adapter Product Model:m10 Noise Ratio: 90db Bluetooth Version:v5.4 Frequency Range:2.402ghz-2.480ghz Frequency Response:10hz-20khz Battery Capacity:400mah(3.7v) Charging Interface:type-c Charging Input:dc 5v-1a(max) Audio Interface:3.5mm Aux//usb Product Size:about 78.6x73x23.7mm(length X Width X Height) Wireless Distance:about 10-20meter (accessibility) Colour:as Shown Material:pc Package Contents: 1 X M10 Bluetooth 5.4 Audio Adapter 1 X Audio Cable 1 X 3.5mm Aux Cable 1 X Type-c Charging Cable Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Re