Smartphone with thermal imaging
The CAT S60 has a 13-megapixel camera as well as an infrared (FLIR) camera. Use the FLIR camera throughout your house to measure surface temperatures and find air leaks and temperature differences behind walls, electrical problems and even beehives. The S60 works with AT&T and T-Mobile and affiliated GSM networks using a nano sim card. It comes with 32GB internal memory and accepts a microSD card for extended storage up to 128GB.
Electrical tools with onboard voltage tester
Tool manufacturer Gardner Bender solves the problem of lost testers by incorporating a tester right into the handles of its wire stripper and screwdriver—tools you're bound to have on hand whenever you're doing electrical work. Simply press the button and move the tool handle near the wires to test before touching. Or, slide the tester off the tool handle to use it as a freestanding unit.
Find the GST-70M Circuit Alert Voltage sensing stripper and SDT-10 screwdriver at home centers and online.
Smartphone inspection camera
For long runs, tape the cable to a stick to feed and aim the camera head. The unit comes with a cloth storage bag and three attachments: a 90-degree mirror, a hook and a magnetic tip. The video quality is good enough to get the job done; just don't expect 1080 resolution for this price. You can find the camera for about $23 at amazon.com.