Lightweight and Comfortable: The MIBRO EARBUDS4 true wireless Bluetooth earbuds adopt a semi-in-ear design, with a single earbud weighing only 3 grams, providing a comfortable experience whether worn for long periods or during exercise. Long Battery Life: The charging case equipped with a 220mAh battery can charge the earbuds 4.4 times, providing a total battery life of up to 30 hours, meeting your needs for long periods of music listening or calling. Efficient BT 5.3 Chip: Achieves zero-delay transmission, lower power consumption, longer battery life, better stability, and anti-interference performance. Hi-Fi Sound Quality: The 13mm composite diaphragm and 32 hi-fi brass ring horn can clearly distinguish the wonderful sound quality of various instruments, bringing an listening . Stable Wearing: Ergonomic design, not afraid of shaking, not easy to fall off, can be worn stably whether it is sports or daily use. Waterproof Design: With an IPX4 waterproof rating, it can effectively prevent splashes and sweat in daily life, allowing you to use it freely during exercise or on rainy days. Optional color: White / Pink / Black / Light Purple Dimensions: 49 *58 * 25mm (+0.15 ) Battery capacity: 220mAh Input parameters: 5V 200MA Output parameters: 5V 100MA Charging time: Approx 2 hours Battery type: Lithium-ion polymer Case weight: Approx. 28.9g Package size: 10*10*3.5cm Package weight: 110g