Tredz Wireless Bluetooth In-Ear Headphones Bluetooth Headphone Earbuds Wireless Workout Sports Headphones Premium Sound and Perfect Fit Features: Bluetooth 4.1 Stereo Earbuds, enjoy music tangle-free In-line microphone and controls for music, volume, play/pause, and incoming calls. Wireless sound-isolating buds-produce rich stereo sound. Superior sound quality with enhanced bass response. Pairs with any Bluetooth enabled devices. Up to 5 - 6 hours of listening and talk time. Specifications: Bluetooth 4.1 EDR Bluetooth Profile - A2DP, AVRCP, HSP, HFP. Talk Time - 4 Hours Music Time - 5 - 6 Hours Operating Range - 10M / 33FT Impedance - 16 Sensitivity - 118db Frequency Response Range - 20~20KHz Max Input Power - 1000mW Charging - 2 Hours Length of cable - 600 mm Weight - 25g What's in the box? 1 - Tredz Wireless Bluetooth Headphones. Extra Large Tips. Carrying Pouch. Micro-USB Charging Cable.Tredz Wireless Bluetooth in-Ear Headphones Bluetooth 4.1 EDR Headphone Earbuds Wireless Workout Sports Headphones Premium.