*Bluetooth version 4.1:Supports two connected devices simultaneously and allows to automatically connecting after paired successfully for the first time . The Headphones are compatible with most cell phones, iPhone and Android.

*Up to 6 hours talk time / music time (Playtime varies according to volume level and audio content). With 150 hours standby time and 1-2 hours charging time.

*Crystal clear sound :CSR solution, this wireless earbuds offer you stereo sound quality with bass.

*Light and portable, easily carry on when running, trekking,biking or at the gym.

*Transimission ambient;within 10 meters(33 feet)