Bluetooth Headphones, TONESOUL Wireless Sports In-ear Stereo Headsets, Sweat-proof Earbuds-Yellow Secure Fit: Lightweight and ergonomic design with soft earhook adjust to the perfect fit. Match your active like Running, Jogging, Cycling, Driving, Camping, hiking gym exercise Amazing sound quality: Bluetooth 4.1 technology delivers astonishing acoustics, with a rich, dynamic sound stage that accentuates every details of your music Extended battery life: Up to 6 hours talk time and 4-5 hours music time, 100 hours standby time, 2 hours charging time Fully compatible with iPhone, Android smartphone, tablets, ipod touch and other Bluetooth-enabled music players, Bluetooth receivers and stereo devices Package content: TONESOUL S966 Bluetooth Headsets, USB charger cable, 2 pairs Earbuds(Large, medium and small), User Manual, cable clip, carry pouch