Bluetooth Headphones iSPECLE Bluetooth V4.1 in Ear Earbuds with APTX Stereo Bass Sound Secure Ear Hooks Sweatproof Wireless Headset IPX4 Waterproof Sport Earphones for Running Jogging Exercise Gym Red Product Features: 1) Flexible ear hooks is Ergonomic Designed to fit for ears easily and stably; across the earhooks help it stay around your neck when don't use it; 2) 3 pairs different sizes of earbuds ( one pair on the Bluetooth headphones included ); 3) The cable clip can adjust a comfortable length; 4) The aluminum part feeling cool and fashionable; the whole wireless flat earbuds is tangle-free, lightweighted, IPX4 waterproof and sweatproof Bluetooth Certification: this Bluetooth Headset adopts CSR8645 Bluetooth Chip;adopts APT-X audio decode technology and CVC 6.0 noise cancellation technology; these technical certifications offer stereo bass sound while enjoying music and clear sound when calling; it could pair with 2 different Bluetooth devices simultaneously; it extends the connection between the wireless earphones and Bluetooth devices up to 33 feet / 10 meter Rechargable and Long Lasting Battery: the Bluetooth Earphones use 110 mAh lithium batteries; its playing time / talking time is up to 8 hours; its standby time is up to 110 hours; the lithium batteries are rechargeable using micro USB charging cable along with the Bluetooth earbuds package; it takes 2 to 3 hours to full charge the Bluetooth Wireless Headphones; Note: We recommend that do not volume up to maximum at the beginning of playing. Instruction: Control buttons are in the cable, Press the MFB button to turn on / off Bluetooth headphones, redial the last call or reject a call, continue / pause playing music; Press the plus / minus button to volume up / down, skip to next / previous track; Long Press ( about 5 seconds )the + / - Button to make Siri Activation to make a call, send a message etc, convinient to be handsfree Application and Warranty: This wireless Bluetooth earbuds could pair with IOS, android system as well Bluetooth devices like iPhone 7 / 7 Plus / 6S / 6 Plus, 5S 5C 5, Samsung Galaxy S7 Edge / S6 / S5, tablets, and other Bluetooth enabled android smart phones. This wireless running headphones is convenient to use in the gym, work out or outdoor activities like running, jogging, exercise, hiking, climbing, biking and so on. This Bluetooth headphone with ear hook has 12 month quality warranty