I bought this because my greenhouse is 30 metres from the house and I wanted to keep an eye on the temperature without trotting up and down the garden. It came well packaged, and does the job nicely. The only problem is the instructions. It took 3 goes to get it set up, but only because the instructions said to press the SET button, when in fact you have to hold it in for more than 3 seconds. Once you've cracked that it's fine!