Bluetooth 5.1 with one step pairing and auto reconnect on power on. Uses a sensitivity antenna for stable connectivity. Compatible with Bluetooth enabled PCs, phones, tablets, and music players. Provides instant connection setup with Bluetooth 5.0. Wearing options and fit The headset is lightweight at about 7 grams. It supports two wearing styles: ear hook and in ear. The adjustable earplug and three ear tip sizes (small, medium, large) ensure a comfortable fit for either left or right ear. Battery life and charging A lithium polymer battery delivers up to 10 hours of talk time or music playback. Charging time is about 1 hour. Playback time varies with volume level and audio content. Design and durability The design emphasizes long wearing comfort for drivers, professionals, and active users. The headset weighs only a few grams and is designed for extended use without fatigue. Water resistance and care The devices feature a nano coating that provides water and sweat resistance. Suitable for jogging, running, yoga, sports, and gym workouts. Not recommended for swimming or hot water exposure. Weight note Some listings indicate a weight of 20 grams, while the primary specification lists 7 grams. Applications and use scenarios Exercise and outdoor activities: secure fit, light design, and sweat resistance for running, gym sessions, and yoga. Hands calls and meetings: convenient for commuting, business trips, and desk work with phones or PCs. Wireless audio playback and system use: seamless pairing with Bluetooth devices for music, videos, and presentations on tablets or computers. Key attributes at a glance Connectivity: Bluetooth 5.1 with onestep pairing, auto reconnect, compatible with Bluetooth enabled devices Wearing options: ear hook and in ear, adjustable tips in sizes S, M, L Weight: approximately 7 g (note: some sources list 20 g) Battery: up to 10 hours playback/talk time Charging: about 1 hour Durability: nano coating for water and sweat resistance Safety note: avoid swimming and hot water exposure