1. Material: PC plastic
2. Usage: 110-220V power supply in-line
3. Transmission rate: 2.40Mbps
4. Bluetooth transmission distance: about 10 meters
5. Bluetooth version: 5.0
6. Working frequency: 2400MHz
7. Interface type: 3.5mm interface
8. Output parameters: DC 5V/2.1A
9. Support protocol: A2SP/AVRCP
10. Basic functions: Bluetooth receiving/transmitting, APP control, U disk playback, 2.1A fast charge
11. Scope of application: notebook computers, desktop computers, projectors, televisions, subwoofers, small speakers, power amplifiers, wired headphones and other devices with audio input/output interfaces
12. Size: about 7.5x5.5x2.5 cm
13. Weight: about 54 grams

Features:
1. Using Bluetooth 5.0 chip
2. Support Bluetooth receiving (RX) and Bluetooth transmitting (TX), two functions in one
3. Both receiving and transmitting modes can be played by plugging in U disk, supporting mp3/flac/wav/wam/ape and other formats
4. Mobile APP control, up and down song/volume adjustment/sound effect adjustment/play source switching
5. Support 110-220V power supply in-line, universal
6. Built-in QC2.0 fast charging module, supporting 2.1A dual USB fast charging, easy charging for mobile phones, tablets, etc.
7. Small and portable, does not take up space, wear-resistant and durable
8. Built-in high-quality decoding chip, high-definition stereo sound quality
9. Intelligently compatible with various devices, plug and play, suitable for devices with audio input/output interfaces
10. ABS multilayer protection, PC fireproof material
11. Built-in large-capacity resistance protection, not easy to get hot, safe circuit