Features include the following:

    On/off/registration mode button
    Volume control
    8 different volume settings
    Vibration alert
    Separate charging status LED
    Interchangeable LED lenses
    Low battery warning
    Supplied with AC mains adapter and car charging kit
    Magnetic holster for attaching to the bivvy
    Up to 500 metres range
    High output weatherproof speaker
    Long life battery
    Protective coated electronics
    Digital circuitry
    Sealed weatherproof case
    Built-in charger for Nickel Metal-Hydride rechargeable batteries (supplied)
    Can also operate from 2 x 'AAA' non-rechargeable alkaline batteries