Other brands to look out for include Gardner, Nash, Steve Neville, and Sundridge – which is the brand that now produces the famous Optonic range of bite alarms.

Taking a closer look at the alarm itself, you have two tidy little snag ears that can be screwed on and off, you have a single button, a small speaker hole and one LED. I've just received these alarms today (came with no instructions) and I can't set up the drop back indication,and I can't work out what the letter C is for on the receiver display where it shows you the settings of each alarm. Other functions: High range of over 200 metres, mute function for 30 seconds, free choice of five LED colours (red, green, blue, yellow, white), illuminated roller wheel in the event of a drop back indication via sound and receiver, 10 volume and 10 sensitivity settings.Regardless of whether predator anglers and carp anglers, these bite alarms must not be missing by any of them. Five bite indicators and 4 TH9s anti-theft alarms can be registered on the receiver, which then also output the alarm on the receiver. You can easily customize the settings according to your preferences while staying within your fishing sanctuary. The VADERX Receiver has a compact and light weight case design that is perfectly pocketable and has the same high quality rubberised finish as the alarms.

The first thing that caught my eye about the ND S9's was the size and shape, they looked sturdy and compact and with a design that looks reminiscent to the head of a "decepticon transformer", I was pretty much sold straight away. I’ve heard/read many stories like this about ND alarms over the years since they released their first alarms. The single LED and the 'buzz' of the buzzer itself isn't going to be running the power down in a hurry.Compared to other alarms on the market, these alarms are half the size and weigh significantly less. The volume has 7 settings including silent, I always have my heads muted or on a low volume as not to disturb anyone, relying on the receiver to alert me.