Bluedio T3 Plus Sport Bluetooth 4.1 Wireless 3D Bass Stereo Headphone Headset Earphone with Microphone Micro SD Card Slot for phone\/MP3\/MP4Description: T3 Plus 、the latest Bluetooth headphones of Turbine Series、is designed and created by our professional Bluedio team. Compared with T2 Plus、 it has a number of major upgrade:Zn alloy frame and body ensures its sturdy enough to be unbreakable and durable; 57mm titanizing diaphragm leads to a better resolution、quicker response and dynamic and swift sound;the totally new 3D sound、adopted by Turbine Series for the first time、will give you a more wonderful sound experience.Specification:           Model       Bluedio T3 Plus           Bluetooth version       4.1 +EDR           Bluetooth transmission frequency       2.4GHz to 2.48GHz           Bluetooth operating range       up to 33 feet (free space)           Profiles       A2DP、AVRCP、HSP、HFP           Audio resolution       up to 24bit@48KHZ           Drivers       57mm *2           Impedance       16Ω           SPL       116dB           Frequency response       15Hz-25、000Hz           THD       <0.1%           Transducer principle       dynamic           Standby time       up to 1100 hours           Bluetooth music\/talk time       about 20 hours           Micro SD card music time       about 18 hours           Charging time       2 hours for full charge           Operating temperature range       -10 Celsius to 50 Celsius only           Headphones dimensions       159*126*78mm           Package dimensions       251*170*95mm           Headphones weight       about 388g           Package weight       about 955g   Package Included: 1 x Bluedio T3 Plus Bluetooth Headphone1 x USB Cable1 x 3.5mm Audio Cable1 x Manual