Voltage Detector Alert Type Light Sound Built-In Flashlight No CAT Safety Rating CAT IV 1000V Display Type No Display Maximum AC Voltage Measured 1 000 V Non-Contact Yes Testing Functions AC Voltage DC Voltage Features Compact and Lightweight Design with Built-In Pocket Clip Allows You to Carry It on the Go Optional Silent Mode for Use in Quiet Areas Power Source Battery Tester Type Non-Contact Voltage Detector/Tester Auto Power Off Yes Battery Size AAA