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 real thing. The measurement allowed error is +/- 1-3cm.