Dual mount your Nightfox Prowls or Prowl 2s for digital night vision in both eyes. This metal 'bridge' allows you to simultaneously mount two Nightfox Prowls or two Prowl 2s onto a helmet or a head mount. It is only compatible with the Nightfox Prowl range of night vision monoculars. Mount two matching devices (it is not suitable for mounting a Prowl with a Prowl 2). Please note you will also need the screws and mounting assembly that came with your Nightfox Prowl or Prowl 2 devices.