Bluetooth Headphones Over Ear, Wireless Headphones, Foldable Hi-Fi Stereo Bass Headphones, Soft Memory Protein Earmuffs, Built-in Mic ＆ Wired Mode for TV/PC/Phone Warranty our product includes a 45-day money back & 24-month warranty. Advanced Compatibility The Bluetooth V5.0 headset can easily and quickly compatible with smartphones, tablets, TVs and other Bluetooth enabled music devices within 33ft (10m) range, bringing you crystal clear sound effect. PLEASE make sure the driver software of receive 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 A swivel folding design makes it easy to store them when not in use or during travels. The slider headband allows you to find the perfect fit and provide excellent durability. The earmuff swivel flat to slip easily into a suitcase or bag. Take it with you anytime anywhere. Dual Modes With a built-in 420mAh battery which provides 20 hours' continuous wireless playback, this wireless headset is perfect for riding, jogging or other sports. In addition, you can easily switch the modes according to your needs. if the battery is low, this product can be used as wired headphone after connecting with an audio cable. NOTE In hot summer, please take off the headphone every 1-2 hrs to get your ears to relax, in order to get better hearing enjoyment, and keep the head comfortable. SPECIFICATION Bluetooth Version: 5.0 Range: 33 feet (10 meters) Music/Talking Time: Up to 20 hrs Charging Time: 4 hours Charging Voltage: 5V Battery Capacity: 400mAh PACKING LIST 1x Bluetooth Headset 1x 3.5mm Audio Cable 1x USB Charging Cable1x User Manual