The initial price is £11.99 but 30% is discounted at the checkout, this is very clear if you scroll down and look on the right hand side of the page
After buying 2 cheap hydrometers off eBay that read about 20% different I wanted a better quality one to monitor my bathroom humidity and the airing cupboard that is very damp. I found this on the Argos outlet with the 30% off it seemed a good price.
They range from £18 to £50 on the internet.
Argos are slim on the description so I grabbed this from Amazon.
Local Weather forecast - Bringing you all the vital weather information you need to plan your day.
Indoor and Outdoor temperature and humidity with trend receiving information from a wireless outside sensor (one included) Can support up to 5 channels with optional sensors*
Daily Hi/Lo memory for in/outdoor temperature and humidity, plus a handy Ice Alert feature also lets you know when outdoor temperatures are nearing freezing
The time is radio controlled (atomic) which is precise to the second and adjusts automatically to and from British Summertime
Dimensions 180 x 100 x 20 mm, Large LED Screen with Backlight Batteries Included
Mine arrived today, I like it so a 2nd is on order. (now a 3rd)