Five Ultra Bright LEDs flashing in random or in sequence. Uses a COB (Chip-on-board) PCB measuring 3cm x 1.5 cm. The flashing frequency is set by a single external resistor between 300K and 1M ohm. A pad connected high determines the random or sequential flash pattern. A second pad connected low determines whether the flashing is continuous or set by a toggle switch. Ideal for schools. 2.0V DC to 3.6V DC operation. Operating current 10 - 16mA. Standby current is less than 1uA.