Bluetooth earphone (4-mic ENC) Airbuds 4

Airbuds fourth generation headphones Model: Airbuds 4, Chip: JL 6983D4, Bluetooth version: V5.4, Effective Bluetooth range: 10 meters, Earphone battery capacity: 30 milliampere, Charging case capacity: 250 milliampere, Charging time: one hour, Music playback time: about 4.5 hours (at 80% volume), Talk time: about 3.5 hours (at 80% volume), Standby time: 50 hours