Features: 100% brand new and high quality Bluetooth-compatible 5.1 stable and continuous connection, bring better connection performance, call effect, compatibility has been significantly improved. Exquisite workmanship, simple operation: the exquisite craftsmanship of abs, one-key operation alarm/turn down the volume or turn up. Synchronization reaches the microsecond level with almost no delay. Suitable for games. The wireless in-ear earphones are made according to the ear canal and fit perfectly. This earphone can not only ensure the comfort of wearing all day, but also improve the sound insulation effect of the earphone. Package Includes: 1 Pair Earphones 1x Charging Box 1x User Manual Specifications: Material:ABS Color:Black,Blue,Green,Red (Optional) Bluetooth-compatible Version: TWS 5.0+EDR Operating Range: About 33feet Barrier-free Transmission Distance (10meters Barrier-free Transmission Distance ) Calling Time:About 2-2.5hours Charging Box Capacity:300mAh Earphone Battery Capacity:28mAh Bluetooth-compatible Protocol: A2DP1.3AVRCP1.6HSP1.2HEP1.7 Woring Frequency:2.402GHz-2.480GHz Freqwency Response:20HZ-20KHz Speaker:112mm 16015% Sensitivity: -92db MIC: 42dB13 note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.