Array of 36 powerful LEDs provide bright, even lighting to range of 35 feet Unique interlocking design allows stacking to create a multi-unit array Up to 2 hours total run time using built-in battery Batteries can be charged via the included USB cable. Securely connects to the shoe-mount on most digital video cameras & SLR's Aluminum bracket for optional mounting to the cameras 1/4” tripod screw Built-in diffuser provides even lighting, eliminates harsh shadows One year limited warranty Specifications: Power 4W 3.7V DC Color Temp: 5600K Luminous Flux: 160LM Ilumination angle: 65°