1. Enjoy a comfortable sleeping experience Mini Pro Sleeping Earphones 2.6mm dynamic driver Provide stable and good sound quality 3. 30 hours of playback time Earbuds are used for 5 hours each time (volume is 100%) The charging box can the earbuds 6-7 times The battery life is 30 hours when wearing two earbuds This data is the product random sampling test data, for reference only 4. Upgraded Bluetooth 5.3 Faster And More Stable 5. Long-term wear without pain ear design Finely polished appearance, fit the ear canal, comfortable to wear. Individual earbud weighs is only 3gweighs 9% less than ordinary earbuds Bluetooth version: 5.3 Wireless support protocol: A2DP AVRCP/HFP/HSP/ Operation distance: 10 meters Driver unit: 6mm Impedance: 16Ω Sensitivity: 100±3dB SPL at 1kHz Frequency response: 2020,000Hz Battery capacity: 30 mAh per earphone Charging box capacity: 400mah Charging time: 1 hour for earphones, 2 hours for charging box Music time: 5.5 hours Supported functions: Answer, call/pause/play/previous song/next song/volume +/volume -/sleep mode Packing method: boxed Weight per set: 100G