Astrum HT310 is a wireless V5.0 Bluetooth headset with built-in FM radio, TF card slot & Aux-In port. High-capacity lithium batteries with low power consumption provides playtime upto 8 hours, depending on volume, comfortable & soft cushioned ear pads are designed to ensure usage of the headphone over-ears for long hours. The new V5.0 chips is capable to handle the high quality sound at high-speed transmission, over a distance of 10mtr for clear & low latency calls and audio-to-video syncronization, without music & video stutter. The 40mm driver is to deliver precision for clear bass & stereo sound for a heart-warming experience. Headband of HT310 is ergonomically design to provide much lesser clamping force compared to other headsets. The headphone is compatible with any Bluetooth device to play the media files. The headphone is charged in approx. 2.5 hours by a Micro USB cable.