Sperry Instruments, Volt Sensor Non-Contact Voltage Sensor, Senses AC Voltage From 50-1000 Vac, No Need To Contact Bare Conductor, Compact Size, Soft Grip, Contoured Design, Hi Impact ABS Housing, Hi Vis 360anddegree. Indication, Loud Beeping Audible Indication, Operates From Single "AAA" Battery, Limited Lifetime Warranty,.