Griffin iTrip Clip
£15 griffintechnology.com
Plug any headphones into the jack on this unit and they become Bluetooth cans! The iTrip Clip pairs with your iPad (or any Bluetooth audio device) and then plays sound to whatever’s plugged into it. It has its own playback controls – including play/pause, skip, and volume – and is powered by an internal battery. Sound quality is good, it’s really cheap, and even includes a mic for calls or Siri. There is a problem, though: there’s a delay on the audio. This doesn’t matter for audio-only stuff, but it’s irritating for video when the picture and sound are out of sync. If this won’t bother you, we recommend it.
Netatmo Healthy Home Coach
£89 netatmo.com
This monitors air quality, CO2 (but not carbon monoxide), temperature, noise,…