Working Time: Around 3 hours(charge automatically) Q29 deliver an industry-leading 3 hours of listening time on one charge. And they’re made to keep up with you, thanks to a charging case that holds multiple additional charges for more than 12 hours of listening time. Standby Time: 50 hours Bluetooth Version: V4.1 Charging Time: Around 1-2 hours Noise Reduction:DSP Charging Interface: USB Profile: HFP/A2DP/HSP/AVRCP Accessories List: Q29 (Contain Ear Tips ) 1* charge Box 1* USB Charging 1* User Manual 4* Ear Tips (S, L) 1* Retail Box 1* Portable Box