Hanging Ear Design: Wireless headphone is light and wear-resistant, comfortable to wear, no ear clips needed to protect the ears from damage. IPX5 Waterproof: Wireless earphone features an open design with surround directional sound field, sweatproof and waterproof, small and portable. Low Consumption: Sports earphone is built-in 180mah battery, Bluetooth-compatible 5.1 chip, lower power consumption, stronger battery life. Powerful Battery: Waterproof headset adopts energy-generating cabin design and built-in large-capacity lithium battery to protect your headset. HD Call: Portable headphone adopts dual-microphone noise reduction technology, which can make clear calls even in noisy environments.