Specifications: Material: Reinforced plastic, stainless steel; Size: Approx. 8.9 x 5.3 x 1.4 inches (225 x 135 x 35 mm); LEDs: Uses 4 high-intensity LEDs; Weight: Approx. 7.1 oz (200 g) (including batteries); Battery: 3 AA batteries (sold separately). In rare cases, the batteries may be difficult to get in, so please do not use the screws on the handle to make it better. Lighting Method: You can switch between the light using the switch on the handle. Light pattern: 3 lighting patterns. Flash pattern with flashing red, blue and green lights fast Flashing pattern with red, blue and green light slightly A gradation pattern that gradually switches between colors such as red, blue, green, green, green blue, red and teal. Note: If you use rechargeable batteries (NiCd NiMH etc.), the device may not perform properly.