Pull the pin to set off the siren and flashing light, push it back in to stop. Hold the side button for the torch, plug it in to charge, change the colour or pick it up and turn it over.
Demonstration only. The siren here is a recording of a real Chirpie Infinity played at a comfortable volume. The real alarm is about 130 dB and, like this one, keeps going with the light flashing until the pin is pushed back in: up to 90 minutes on a full charge. The alarm light flashes much faster on the real unit, in bursts of about 10 flickers a second. It is slowed to three flashes a second here to stay within photosensitivity guidelines. Colours on screen are a guide only.