1.These Noise Canceling earbuds include S/M/L ear tips and two types of different ear hooks to ensure a comfortable and secure fit for everyone. With specially designed ear hooks, you will never worry about the ear buds falling off in a gym or workout again.2. Up to 6 hours talk time / music time (Playtime varies according to volume level and audio content). With 145 hours standby time and 1-2 hours charging time. Since it has a super Light Weight Design, the net weight is only 3.17 ounces; you will feel nothing for gym and workout.3.Built for your active lifestyle, the earbuds are rated IPX Level 4 and can withstand dripping sweat. Ergonomic design optimized for ultimate wearing comfort to match your active lifestyle like running, jogging, cycling, driving, camping, hiking gym exercise and other outdoor sports.4.Supports two connected devices simultaneously and allows to automatically connecting after paired successfully for the first time. HD STEREO & NOISE CANCELLATION: Adopted CVC Version 6.0 NOISE CANCELLATION technology, guarantees HD stereo sound quality and provides steady Bluetooth signal and provides steady Bluetooth signal and support stereo loss less music. The Headphones are compatible with most cell phones, iPhone and Android.Sport Headphone Wireless