The Scantronic FOB-2W-4B is a modern sturdy designed two way intruder alarm keyfob. The Scantronic FOB-2W-4B is an accessory for any Scantronic i-on or new Menvier intruder alarm product, it gives the end user feedback on the intruder alarm system status and also confirms if the system has been set upon exit. The Scantronic FOB-2W-4B has a massive radio range of 200m this has been made possible with advanced transmitter and receiver design.