Stable connection: Bluetooth 5.3 chip is adopted, which has stronger compatibility and stability Two-in-one function: Bluetooth reception (RX) and Bluetooth transmission (TX) Support two phones connection: Two mobile phones can be connected at the same time to listen to music LED digital display: The working status is clear at a glance RGB light: With colorful light effects, making it more atmospheric Long working time: Built-in 1000mAh rechargeable lithium battery, listens to music for 10-12 hours after fully charge, and the standby time can reach 30 days Multiple interfaces: Built-in digital signal to analog chip, supports digital optical fiber, coaxial, AUX, RCA connection Convenient touch connection: Equipped with upgraded wireless NFC sensing function, one-touch connection/disconnection of mobile phone Compatible with multiple formats: Support U disk to play and transmit signals, support the playback of multiple lossless audio files High-definition sound quality: Built-in high-definition microphone, supports wireless listening, hands-free calling, navigation Easy to use: No need to download any driver or APP Specification: Bluetooth version: Bluetooth V5.3 Chip: AC6951C Battery capacity: 3.7V/1000mAh (UN38.3) Charging time: About 1.5 hours Using time: Listen to music for about 10-12 hours and stand by for 30 days Transmission range: 10-20m (barrier-free) Interface: 3.5mm AUX/2RCA/USB/Coaxial/Optical/Type-C Input: DC 5V-1000mA (MAX) Support protocol: A2DP/AVRCP/HFP/SBC U disk/TF music format: MP3/APE/FLAC/WAV/WMA/ALAC/M4A/AMR Using method: Drive free Material: High-strength fireproof V0 PC (70%)+ABS (30%) Functions: Bluetooth receiving, Bluetooth transmitting, U disk playback (maximum support 128G), NFC touch connection, RGB phantom display Support devices: All kinds of speakers, desktop computers, laptops, TVs, power amplifiers, projectors