Feature: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 antisweat 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.Specification:Item Type: Bluetooth EarbudsMarerial: ABSWeight: Approx. 120g/ 4.2ozChip Version: V5.3Horn Diameter: 13mmTransmission Distance: 18-20mBattery 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 monthsTalk/music Playing Time: 3-5 hoursInterface: Type-CCharging Time: 1-2 hoursFrequency: 2400.0-2483.5MHzOperating Instructions:1. Switch on: Switch on the headset when out of the case, and display function on the mobile phone to be connected2. Shutdown: Put the earphone in the charging case. The earphone shuts down and charges automatically3. Matching: Automatic pairing4. Answer the phone: click the multi-function key5. Rejected calls: Long press the multifunction button6. Hang up: Click the multifunction button7. Play/Pause: Click the multifunction button8. Volume increase: Double click the multi-function button on the main earVolume reduction: double click the secondary ear multifunction buttonNext song: click the main ear multi-function key for three timesLast 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 Seconds10. Cancel Voice Assistant: Long press for 2 Seconds11. Remarks: The main and the secondary ear are random, the one you first heard is the main one..Package List:2 x Earbuds1 x Charging Case4 x Ear Cap1 x Type-C Cable1 x Instruction