The NV Back has been designed to adapt one of the most popular roller wheel alarms into a multi-function wireless system. Product design and development was conducted over a considerable time period and we subjected these units to some serious testing bankside.

For a professionally fitted NV back service from the team that designed it!

If you require the external stubby antenna fitting service here is the place to get it done.

If you have an AVA alarm it wont work with most sounder boxes due to their anti theft design of the day. This mod fixes it so that you can use it with the ATTx V1 V2 and other sounder boxes.

This upgrade will "uplight" your roller wheel from below with an LED modification to your alarm.
Please note the original LED is disabled in this process.

ATTs LED colour change. Simply add the amount of alarms LEDs you want changing to the basket and then checkout and send to us at PO Box 2638, Romford, Essex, RM5 3WD please include a copy of the purchase confirmation email AND what colour LED you want the alarms to have.

Price PER LED, this allows you to add up to 5 "LEDs" to the basket, once the amount of LEDs you want changed are in the basket, checkout and send the receiver with a print of your purchase confirmation email to PO Box 2638, Romford, Essex, RM5 3WD. To make matters easy please include a drawing of 5 circles with the LED colours as you want them from Left to Right. Please make sure you do NOT change more LEDs from the ones fitted than you purchase as this will incur extra charges and delay your order.