Features and Benefits: A sleek and compact USB rechargeable pen light – RED C4 LED produces up to 70 lumens, 630 candela and runs 3.5 hours Lithium ion battery recharges in 2.5 hours and is rechargeable up to 300 times Fully regulated output for consistent lumen performance over the battery life Gasket sealed glass lens, IPX4 water resistant and 1 meter impact resistance tested Charge indicator lights red when charging and green when fully charged.