Epic alarms offer 6 different LED colour options at the touch of a button plus tone, volume & incredible sensitivity. They have a totally unique battery compartment which allows the alarm's electronics to be completely sealed for total reliability, whilst giving incredibly easy access to the battery compartment. It's super thin meaning that you can use it at any angle whilst still ensuring perfect contact with the roller wheel Receiver: The epic receiver can be easily & quickly paired with 6 different ealarms & is supplied with a Wychwood lanyard to place round your wrist or hand in your shelter; it also fits easily into a pocket or stands uprights on a bivvy table or bucket. Slimmest alarm in existence 6 LED colours changeable on the alarm head 5 volume settings 6 tone settings Sensitivity from 5mm to 15cm Unique fixing for all bobbins on the market Twin nightlights Neoprene case Lithium ion battery for long life Automatic power save function Can be used with the rod at a 45 degree angle Metal outer shell for robustness Enhanced water resistance Up to 6 alarms can be paired up at any one time Receiver takes the tone of the head it is paired with Batteries not included