Specification: Origin: Mainland China Voltage: 5V 18650 battery voltage: 3.7V Output port, power the monitor through the data line Dimensions: 77.00x30.00x21.00mm/3.03x1.18x0.83inch Material: Mixed materials Accessory Type: Battery Accessories Hign-concerned Chemical: None Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x 18650 Lithium Battery Charger Board 1.Cost-Effective: This 18650 lithium battery charger board offers a high value for money, as it allows users to utilize their existing lithium batteries for extended camera runtime. The battery capacity determines the duration of the extended runtime. 2.Simple and User-Friendly Operation: The DC-DC step up booster converter is designed with simplicity in mind, making it extremely easy to use. With its plug-and-play functionality, all you need to do is install the batteries, and you're ready to power your devices. 3.Seamless Power Transition: By using the module connection, the quick charging board seamlessly switches to battery power in the event of a power outage, eliminating the need for a restart. It maintains a continuous connection. 4.Versatile Compatibility: The charging backup power supply can be used with other 3.7V lithium batteries, providing flexibility in battery selection. Alternatively, it can be used with pre-configured 18650 battery packs. 5.Wide Range of Applications: This fast charge module is suitable for providing uninterrupted power supply (UPS) to cameras and surveillance systems. Users have the freedom to add lithium batteries, offering a cost-effective alternative to expensive market-priced surveillance UPS power supplies.