An alarm apparatus, in particular an alarm apparatus having at least two separate parts, includes an alarm unit and a user portion for generating a localized alert. The user portion has an attachment means for attaching the user portion about or onto a part of the user's body. The user portion includes a lock which in use is adapted to lock the user portion about or onto a part of the user's body. The alarm unit and user portion in use are located apart one from another and the lock is adapted to unlock upon presentation of the user portion to the alarm unit.