Specifications:Bluetooth 5.0 chip provides high speed transmission, stable performance and low consumption.Ergonomic design with soft earmuff make it comfortable to wear.With foldable and retractable design, it is easy to carry and store.With large capacity battery, it has long standby time of 120 hours.It has microphone with 40mm speaker, which brings you excellent music experience.Item Name: Wireless EarphoneMaterial: ABS, SiliconeBluetooth Version: 5.0Transmission Space: 10mFrequency Band: 2.4GHzFrequency Response: 20-20000HzSupported Protocols: A2DP/AVRCPBattery Capacity: 250mAh (Included)Driver: 40mmImpedance: 32ohmCharging Time: about 2 HoursTalk Time: about 8-10 HoursMusic Time: about 8-10 HoursStandby Time: about 120 HoursFeatures: Wireless, Foldable, with MicrophoneSize: 14cm x 10cm x 6cm/5.51" x 3.94" x 2.36" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wireless Headphone1 x Audio Cable1 x Charging Cable