Specification: Item Type: Bluetooth Earbuds_x000D_Marerial: ABS_x000D_Weight: Approx. 120g/ 4.2oz_x000D_Chip Version: V5.3_x000D_Horn Diameter: 13mm_x000D_Transmission Distance: 18-20m_x000D_Battery Capacity: 50mAh polymer lithium battery (shipped with built-in battery)_x000D_Charging Case Capacity: 400mAh polymer lithium battery (shipped with built-in battery)_x000D_Standby Time: 1-2 months_x000D_Talk/music Playing Time: 3-5 hours_x000D_Interface: Type-C_x000D_Charging Time: 1-2 hours_x000D_Frequency: 2400.0-2483.5MHz_x000D_Operating Instructions:_x000D_1. Switch on: Switch on the headset when out of the case, and display function on the mobile phone to be connected_x000D_2. Shutdown: Put the earphone in the charging case. The earphone shuts down and charges automatically_x000D_3. Matching: Automatic pairing_x000D_4. Answer the phone: click the multi-function key_x000D_5. Rejected calls: Long press the multifunction button_x000D_6. Hang up: Click the multifunction button_x000D_7. Play/Pause: Click the multifunction button_x000D_8. Volume increase: Double click the multi-function button on the main ear_x000D_Volume reduction: double click the secondary ear multifunction button_x000D_Next song: click the main ear multi-function key for three times_x000D_Last song: click the secondary ear multi-function key for three times_x000D_(Note: this function is only applicable for Android. You cannot adjust the volume by pressing the button on for iOS system. You need to adjust the volume by yourself in Bluetooth Settings.)_x000D_9. Voice Assistant: Long press for 2 Seconds_x000D_10. Cancel Voice Assistant: Long press for 2 Seconds_x000D_11. Remarks: The main and the secondary ear are random, the one you first heard is the main one. Features: 1The new generation Bluetooth 5.3, high performance, no delay, no connection lag, high performance and low power consumption. 2Perfect fit to the contour of the ear, comfortable in-ear and ergonomic design, can be wear for a long time without hurting your ears. 3Effective anti?sweat performance, whether it is a hot summer or fitness exercise, you can enjoy the music anytime. 4The moving coil of 8mm and graphene diaphragm were selected as the generating unit, smoothly connected high and low frequencies. 5Adopt high quality ABS material,firm and durable, provide longer service life. PackageList: 2 x Earbuds 1 x Charging Case 4 x Ear Cap 1 x Type-C Cable 1 x Instruction