BOROFONE BW65 Deseo true wireless BT headset - black

1, Bluetooth 5.4, chip: JL AC6973 2. Battery capacity: charging case 250mAh; Headphones 30mAh 3. Use time: 4 hours 4. Size: 55.5*47*22mm; Total weight: 38g 5. Support master-slave switching, up and down song switching, summoning voice assistant and other functions