JBL SENSE LITE True Wireless Open-Ear Headphones Multi-point / IP54 Dustproof and Waterproof Color: Black Product Description Comfortable fit with liquid silicone ear hooks, also used in medical devices, and a 3D ergonomic design. "Lightweight design, approximately 9.5g per side, for comfortable long-term use. The earphones themselves are IP54 waterproof and dustproof." 18x11mm dynamic drivers and a bass boost algorithm deliver dynamic JBL sound. "OpenSound Technology" minimizes sound leakage without compromising sound quality. Four beamforming microphones in total ensure clear voice calls even outdoors. "Long battery life with up to 32 hours of playback (approximately 8 hours on the earphones + approximately 24 hours using the charging case = up to approximately 32 hours)." Multi-point support allows simultaneous connection to two devices. "Dual Connect + Sync" function allows use of a single earphone.