Sperry Instruments, Scantest 5 In 1 Multi Scanner, Detects Wood Or Metal Studs, Metal Objects & AC Voltage, 50-600 VAC, Tests 3 Wire Outlets & GFCI Protected Circuits, Snap Together Design For Compact Storage & Convenience, Soft Grip, Contoured Design, Hi Impact ABS Housing, Audible & Visual Indication, Battery Operated, Limited Lifetime Warranty.