【High Brightness & Low Power Consumption】: Rechargeable and environmentally friendly penlight with built-in rechargeable lithium battery and charged by USB cable (included). Charging time: 90-120 minutes, discharging time: 2-3 hours. 【Lightweight Design】: USB rechargeable mini LED flashlight with USB cable. Light weight: Ultra light, small size and portable, only 30g weight. It is so light that you can carry it with you wherever you need it. 【Durable Stainless Steel Body】: Made of high quality stainless steel with advanced and waterproof design, better than aluminum alloy and plastic penlight. Metallic sense. 【Wide Applications】: Not only used for medical examination in hospitals and schools, for home, school, office, outdoor activities, nurses and doctors, but also for lighting up the dark night or emergency situations. 【3 Pack】: Includes 3 pack penlight, 3 USB charging cables.