New Lenovo thinkplus TW50 wireless earphone BT5.3 matal material hifi high quality dolby AAC dynamic driver headphone features: BT5.3 chip provides faster connection, more stable, lower latency and lower power consumption. HIFI sound quality, 360 dolby panoramic sound and equipped with graphene composite diaphragm ,it can make music more real 10mm large dynamic driver,highly sensitive composite diaphragm, highly restore music details; AAC environmental noise reduction, dual microphones make calls more HD 3.Parameters: item name: Lenovo thinkplus TW50 type: in-ear headset earphone material：metal audio decoding: AAC/SBC color: black, white (optional) BT chip: BT 5.3 transmission distance: 8-10m charging port: type-c battery capacity: 300mah(charging case), 35mah(earbud) charging time：2-3h calling time: 3-4h playing time: 3-4h increase and decrease volume:triple-tap headset, left plus right minus switch music: double-tap the headset package size:153*108*53mm package weight: 244g 4.Note: item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Please do not immerse the earphones in water to prevent damage, thank you. Please charge the headset after receiving it the actual use may be slightly different depending on the specific situation. 5.Package list: 1 * pair of earbuds 1 * charging case 1 * charging cable 1 * user manual