The wireless nature of this kit enables the PIR product to be used in a domestic environment without the need for a wired nurse call system, thus enabling a patient to be cared for in their own home environment instead of a rest home situation. This kit is especially useful when caring for aged family members living with dementia. Typically set up by the leg of a bed or near a doorway, when the individual moves past the sensor the call bell will be activated and heard at the receiver unit. As the receiver unit is small and portable it may be taken elsewhere in the home wherever the caregiver is located. When activated, the receiver also displays a small LED light which is useful if the carer is hearing impaired. The call bell sound can be adjusted to 30 tune options.The PIR unit comes with a wall mounting bracket and screws. We strongly recommend using it powered by the plug pack (included) but if there is no power point nearby you may also power it with a 9-volt battery. Please note, using it this way the battery will only last a few days. Note: The PIR sensor must be reset at the unit after activation.