The Defender MKA Torch meets our criteria for:
* Easy pin release, requiring only a single hand to activate.
* Replaceable batteries, so that you won't have to dispose of the alarm when they go flat.
* Robust design, that will stand up to hard impact on a tarmac/concrete surface
* Small, to fit in the hand or nag on a bunch of keys
* VERY LOUD! with a 130dB siren. It'd be pointless otherwise
* Bright neon torch, that's only illuminated whilst the button is pressed. This makes it a useful item to have close to hand.
* Value for money. At just £3 it'll make an ideal gift for friends and family.

For advice & training on how to use this device please talk to one of the Hants CKD instructors.