Playing time up to 7 hours and even to talk mode up to the 5 hours. Package Contains 1xOriginal T11 headphones, 1 x charging cable, 1xAux cable. Cord Length: 2 charging. Time: 2-3 hours. Frequency Response: 20 Hz- 20kHz. Impedance: 32 ohms. Sensitivity: 108 dB. High sensitivity for a loud, clear sound Headphone Driver Unit 40mm Headphone. Frequency Response-20 Hz- 22 kHz. Comes with the 3.5mm plug connector. Compatible with portable devices like handsets, MP3 players, iPhone, Android, etc. Bluetooth headphones can be used at home, on the street, travel, office and so on. You can enjoy music everywhere.