1、The new generation Bluetooth 5.3, high performance, no delay, no connection lag, high performance and low power consumption. 2、Perfect fit to the contour of the ear, comfortable in-ear and ergonomic design, can be wear for a long time without hurting your ears. 3、Effective anti‑sweat performance, whether it is a hot summer or fitness exercise, you can enjoy the music anytime. 4、The moving coil of 8mm and graphene diaphragm were selected as the generating unit, smoothly connected high and low frequencies. 5、Adopt high quality ABS material,firm and durable, provide longer service life. Item Type: Bluetooth Earbuds Marerial: ABS Weight: Approx. 120g/ 4.2oz Chip Version: V5.3 Horn Diameter: 13mm Transmission Distance: 18-20m Battery Capacity:  50mAh polymer lithium battery (shipped with built-in battery) Charging Case Capacity: 400mAh polymer lithium battery (shipped with built-in battery) Standby Time: 1-2 months Talk/music Playing Time: 3-5 hours Interface: Type-C Charging Time: 1-2 hours Frequency: 2400.0-2483.5MHz Operating Instructions: 1. Switch on: Switch on the headset when out of the case, and display function on the mobile phone to be connected 2. Shutdown: Put the earphone in the charging case. The earphone shuts down and charges automatically 3. Matching: Automatic pairing 4. Answer the phone: click the multi-function key 5. Rejected calls: Long press the multifunction button 6. Hang up: Click the multifunction button 7. Play/Pause: Click the multifunction button 8. Volume increase: Double click the multi-function button on the main ear Volume reduction: double click the secondary ear multifunction button Next song: click the main ear multi-function key for three times Last song: click the secondary ear multi-function key for three times(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.) 9. Voice Assistant: Long press for 2 Seconds 10. Cancel Voice Assistant: Long press for 2 Seconds 11. Remarks: The main and the secondary ear are random, the one you first heard is the main one. 2 x Earbuds 1 x Charging Case 4 x Ear Cap 1 x Type-C Cable 1 x Instruction