Voltage : 5Product feature: Features a 3-channel charging slot for storing 2 tf sd cards, with fast 15w usb-c input that fully charges 3 batteries in just 150 minutes.Size dimensions: 24.9d x 59.5w x 2.8h cmTELESIN pocket charger is thin and compact in size, easy to put in your pocket and carry in hand. Compatible with all TELESIN blue square and yellow round HERO 12 11 10 9 battery, TELESIN Stamina battery, GoPro original standard battery and enduro battery for GoPro HERO12/11/10/9 Black camera.Built with side charging port, which makes it possible store the charger with cable in pocket together. Each battery slot has individual smart indicator light, insert battery or open charging box cover to display the current power status.Note: There might be an error of 1-3 cm due to manual measurement, and slight color differences may occur as a result of varying lighting and monitor effects.