Lenovo Thinkplus XT86 Semi-In-Ear Wireless Bluetooth Earphones With Digital Display Charging Compartment 1. Bluetooth version: V5.2 2. Effective distance: about 10 meters 3. Battery capacity: 300mAh (charging compartment), 30mAh x 2 (headphones) 4. Speaker size: 12mm 5. Speaker sensitivity: about 114dB 6. Dimensions: about 34.6 x 22.6 x 18.4mm Features: 1. Low-latency gaming, can realize audio and video synchronization, listen to the sound, always grasp the rhythm of the game. 2. After the first Bluetooth pairing connection, once again use, pick up the headset can be connected. 3. Binaural monaural use, can be shared, a machine for multiple uses 4. Charging compartment with LED digital display screen, can display the charging compartment power can also display binaural power, with the power switch, can be a key switch to switch the display screen 5. Bluetooth V5.2, stable and non-linear listening, non-destructive decoding transmission, high-definition sound quality 6. Ergonomic design, solid fit to the ear contour, long time wear without pain, more comfortable to use 7. The headset can be used for about 4 hours, with the charging case can provide up to 24 hours of high endurance 8. 12mm composite diaphragm moving coil unit, strong resolution, rich details, true reproduction of music, low, medium and high three-frequency balance 9. Effectively increase the depth of the ear, effectively isolate the external sound, experience the immersive feeling of silence in the noise Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.