Black Calls/Music/Sport/Everyday In-ear Headphones True Wireless Stereo (TWS) Intraaural Earbuds Microphone type: Built-in Built-in battery The Genius HS-M905BT Bluetooth TWS (True Wireless Stereo) earbuds with Bluetooth wireless technology allows you to enjoy music and answer calls seamlessly from mobile phones and other devices. Plus, High quality audio with bass, comfortable wearing.Key featuresBluetooth earbuds for music & callsBluetooth 5.3 transmissionHiFi quality sound with bassComfortable in the earPlay music time up to 4 hoursUp to time for 260 hours of standbyType-C chargingModel nameHS-M905BTPlay / Call timeup to 4 hoursWorking distanceup to 10 metersStandby timeup to 260 hoursBluetoothversion 5.3Charging case battery 3.7 V / 200 mAhEarbuds battery3.7 V / 40 mAhUSB Type-C cable length 30 cmProduct dimensions W x H x D mm (inches)Earbuds: 16.5 x 33x 21 ( 0.65 x 1.3 x 0.83 )Charging case: 49.6 x 25.6 x 45.3 ( 1.95 x 1.0 x 1.78 )Weight (g) Earbuds: 7 g / Charging case: 22 gColo