Suggested Retail:$30. ZIRCON StudSensor HD70 Stud Finder. The StudSensor HD70 1 Step stud finder features bright, backlit LCD display and Target Spotlight that illuminates on-screen when you've found the center of a stud. A low battery indicator also informs you when your battery should be replaced for optimum performance. 2 stud scan modes find the center, edges, and direction of wood and metal studs while also alerting you to the presence of live AC electrical wiring.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.