Mindkoo Wireless Bluetooth Headphone Smart APP (Android OS) NFC Bluetooth 4.1 Sports Stereo Wireless Foldable Headset for Cellphone, Laptop - Red -[UNIQUE FUNCTION]- With a smart app(Android OS), keep record of your fitness activity with the built-in pedometer, so you will know exactly how many calories you have burnt and the distance you have covered. It is a great function for Outdoor Hiking, Running. -[LONG STANDBY TIME]- 180 Days. LONG TALK TIME: 60 Hours. CHARGE TIME: 3 Hours. MUSIC PLAY TIME: 45 Hours. PLEASE NOTICE: This info is only for estimate, not a very precise data. -[NOTICE IMPORTANTE]- You can connect to a compatible communications equipment without using cables by bluetooth wireless technology. The connection does not require that the phone and the headset to position the positive.however, the maximum distance between them should not exceed 10 meters. Bluetooth connection may obstructions by walls or other electronic devices interference, and distance connections may also be shortened. -[GREAT SOUND]- It uses echo cancellation and noise suppression technology to help give you a clearer sound which works very well. Both sides of the conversation sound great without any static or background noise. -[NFC SUPPORT]- The use of advanced Bluetooth 4.1 technology and NFC Fast pairing Function, when high speed connecting, bring higher-quality stereo sound experience.