XO BE31 Lavalier Business Bluetooth earphone One-key retractable

■Bluetooth version: 5.0 A chip: Jerry JL6976D ■Battery: 501515 3.7v 70mAH polymer lithium battery ■Functions: make and receive calls, listen to songs, redial the call, prompt in English, switch the machine to vibrate twice, and vibrate to respond to incoming calls ■Material: ABS ■Music/Talk time: 10