Gembird bluetooth V5.0 slusalice, 32ohm, 40/250mAh, touch control and Siri function TWS Bluetooth: V5.0 Impedance: 32 Ohm Frequency range: 2.4Ghz Headset battery: 40 mAh Charging Case battery: 250 mAh playing time: up to 4 hours Charging time: 1 hour Touch control and Siri function