EUROLITE LED Buzzer Police Light blue is a battery-operated LED warning beacon with a rotating double reflector and a 1 W blue LED. The plastic cap serves as an on/off switch, with an additional switch at the battery compartment. Silent operation is provided at 70 RPM. The unit can stand on a surface or be wall-mounted and requires three AA batteries, not included. Its beam angle is 20°, and dimensions are 12 × 12 × 10.6 cm.