AUSDOM M04 Bluetooth headset is a headset supporting Bluetooth V3.0. It adopts exclusive DWS technology, bringing you detailed wireless high fidelity and deep bass sound. With built-in microphone and Bluetooth HD call design, it supports hands-free call. The built-in 400mAh Li-Po rechargeable battery supports about 20 hours music playing time and more than 250 hours standby time. Besides, the headset uses artificial carbon fiber earmuffs and soft cushion headband, giving you long-time comfort. The 180 degree rotated ear muffs are adjustable to any angle, saving space for storage. With the 3.5mm audio cable in the package, the headset can be used as wired headset as well. In a word, this Bluetooth stereo headset will bring you an excellent music and calling experience. So buy this Headphone and Save $6.04 OFF + Free Shipping For AUSDOM M04 Bluetooth 3.0 Wireless Stereo Bass Headset High Fidelity Headband Earphone.