The Bluedio T2 Fashionable Swivel Folding Style Wireless Bluetooth 4.1 Headset combines sleek modern design and advanced technology to deliver best listening experience. Built with 57mm 16Ω ultra large alloy driving units， it reproduces rich， crisp bass response and faithful dynamic audio. Wireless Bluetooth connectivity avoids the hassle of running wires. Meanwhile， you can still choose line-in mode for use with devices that don’t support Bluetooth. What’s more， line-out connection allows you to share music with another pair of earphones. Isn’t it brilliant and cool? Don’t hesitate to have a try!                                    Features            Combine sleek modern design and advanced technologyBuilt with 57mm 16Ω ultra large alloy driving unitsReproduce rich， crisp bass response and faithful dynamic audioWireless Bluetooth connectivity avoids the hassle of running wiresStill support line-in mode for use with devices that don’t support BluetoothLine-out connection allows you to share music with another pair of earphonesFolding design， easily fit into your bagSoft earpads with swivel earcups， comfortable for all-day wearUp to 1625 hours super long standby time                                                            Specifications            Color    Black    <br>Transducer Type    Dynamic    <br>Bluetooth Version    V4.1    <br>Frequency Range    2.4GHz-2.48GHz    <br>Operating Distance    Up to 10m (Free Space)    <br>Bluetooth Profiles    A2DP / AVRCP / HSP / HFP    <br>Impedance    16Ω    <br>Frequency Response    20Hz-20kHz    <br>Sensitivity    110dB    <br>Distortion    !#!lt!*!0.1%(THD)    <br>Talk Time    Up to 45 Hours    <br>Standby Time    Up to 1625 Hours    <br>Charging Time    about 2 Hours    <br>Operational Temperature    -10 to 50°C    <br>Dimensions    (7.17 x 5.12 x 3.15)" / (18.2 x 13 x 8)cm (L x W x H)    <br>Weight    9.63oz / 273g    <br>                                                            Package Includes            1 x Bluetooth Headset1 x USB Cable1 x Connecting Line1 x User Manual