Arlo Pro 3 Smart Home Security System 2 Camera Kit (£550)
"If you know someone who's still using an old-fashioned burglar alarm, switch them over to Arlo security cameras. You can set different rules around the house (and outdoors) to monitor, record, and trigger alarms. You can also use it to spy on pets, and for that alone, it's worth the investment!" — Gemma Cartwright, senior editor, UK