Immersive Hi-Fi Sound Designed for an excellent listening experience, Mpow Bluetooth headset with CSR chip and around-ear cushion design can provide robust, immersive and Hi-fidelity sound. Advanced Compatibility The Bluetooth headset can easily and quickly connect with smartphones, tablets, TVs and other Bluetooth devices within 33 feet, bringing you crystal clear sound effect. PLEASE make sure the driver software of receiving adapter is fully updated when connected to PC or laptop, and you need a SEPARATE Bluetooth adapter when connected with TV. Foldable and Portable Design The foldable design makes it easy to store them when not in use or during travels. The stainless steel slider headband allows you to find the perfect fit and provide excellent durability. Dual mode: Wireless and Wired In the wireless mode: With a built-in 420mAh battery which provides 13 hours' continuous wireless playback and let you get rid of the tangled cables on the move; In the wired mode: Used as a wired headphone with an audio cable. Note: 1. Please keep the headset in dry and cool environment as the earmuff is made of memory-protein materials. 2. The microphone only works in the wireless mode. Specification Bluetooth Version: 4.0 Range: 33 feet (10 meters) Talking Time: Around 15 hours Playback Time: Around 13 hours Charging Time: 4 hours Charging Voltage: 5V Battery 420mAh Packing List 1 x Mpow Bluetooth Headset 1 x 3.5mm Audio Cable 1 x USB Charging Cable 1 x Packing Bag 1 x User Manual Warranty Every Mpow product includes a 45-day money back and 18-month warranty.