Bear Motion BMTLTSMGRAY Multi-Functional Rechargeable LED Desk/Table, Flash, Camping, Tent Lamp, Night Light with 5 Level Dimmer Function, 7" x 4.7" x 2.1" Rechargeable - charging from 5v/2a USB charger - up to 20 days standby time with 4 hours charging 1 button operation - turning on, standing by, dimming, shutting down with just one button to operate Waterproof and dust proof design, stays up to 2 hours under the water Extreme design - 8 feet shockproof - works well in 40F cold environment