Features: 1.Through the serial connection of the transmission chips, the vocal fusion conversion of the two mono headphones is realized. 2.The left and right headphones can be used separately. 3.Drive your office call and release your hands to make the call convenient and safe. 4.Free wireless restraint and enjoy better wireless stereo (Note: Bi-directional calls are not supported in TWS mode) 5.4.5 grams per ear, to achieve a more compact and compact appearance, invisible wear without pressure. 6.Abandoning the complicated button design, a single earphone is designed with only one large button, which is user-friendly and easy to operate. Specifications: General Specification Brand Joyroom Model T01 Color Black Wearing Type In-ear Net Weight (g) Earphone: 4.5g*2 Charging Case: 48g Dimensions (cm/ inch) Earphone: 23*23*17mm Charging Case: 80*4.4*30mm Technical Parameters Microphone Yes Wired Control Not support bluetooth Version 4.1 Transmission Distance 10m Battery Capacity Earphone: 40mAh, 3.7V Charging Case: 650mAh, 3.7V Charging Time (h) Earphone:1.5-2h Charging Case: 3-4h Taking Time 2h Standby Time (h) 50h PackageIncluded: 1*Joyroom T01 bluetooth Earphone With Charging Case 1*Charging Cable 1*Manual