1byone&reg; Type QS-0082 Mini DC LED Strobe Square Light, Flashing Lamps Lights, Apply Lighting For DJ Disco House Party Hotel Stage Office Camping Field Etc, Lighting For Halloween And Christmas Power Sources: 3x1.5V AA batteries Battery working time: About 120 hours, Flashing Frequency: 2.5Hz ~ 8Hz, Adjustable Dimensions: 4.17x3.7x1.57in(106x94x40mm) Built-in LED Size: 0.197in Built-in LED Quantity and wattage: 4pcs Red or Green LEDs, 0.24W