In the event of a fire or CO leak, the WI-safe smoke and carbon monoxide pack wakes you up sooner, automatically converting into an escape torch helping you to get out. As an intermitten sound acts as a locator in the event of a CO leak or fire waking you up sooner than usual. This portable handset can be placed anywhere in your home but typically by your bed.When the smoke or carbon monoxide alarms go off the handset will sound an alarm and flash giving you an early warning sign and a better chance of escaping. The handset can be used as a torch and emits a sound so it can be located.