Hi-Fi Stereo Bass Sound CVC6.0+DSP audio processing dual noise reduction technology to improve sound quality, provide accurate HD sound and powerful bass put you on the music stage center IPX5 Waterproof IPX5 Waterproof Nano-coating efficiently prevent harmful dust accumulation, rinse with water without any damage, perfect for running,skiing, etc Multiple compatible Bluetooth wireless headset is compatible with all bluetooth devices, as long as the device has bluetooth, wireless headphones can be used Safe use Listen to music and the surrounding environment, so you can keep riding, running, driving safe, more convenient for business, work Non-bone earphone Our earphones are ear-mounted earphones that are close to the ear and not in-ear, and are not damaged to the eardrum and comfortable to wear 1.The black headphone: wireless, lightweight, Bluetooth headset, waterproof, Unique shape and easy/convenient to use, with rubber earplug. 2.When using a Bluetooth headset to make/receive calls, you need to select Bluetooth to answer. 3.Two Bluetooth headsets can be connected to a mobile phone at the same time, but the two Bluetooth headsets cannot work simultaneously. 4.The sound you hear is reduced during a call. 5.Lifetime Return: We only adopt Safe and Qualified Material. If you are not satisfied with the Bluetooth headset, please tell us We will Solve the problem quickly within 24 business hours.