Stanley Stud Sensor *Model Number: 77-050 *Length: 9 in. *Width: 4 in. *Product Type: Stud Finder *Scan Depth: 3/4 in. *Number in Package: 1 pc. *Detects Voltage: No *Detects Metal: Yes *Audio Alert: No *Packaging Type: Clamshell *Battery Size: 9V *Batteries Included: Yes *Color: Yellow *Scanning technology accurately detects and locates wood and metal studs, beams and joists behind plywood and drywall up to 3/4 in. thick* Battery not included* Easy visual indicators on faceof sensor* LED display & buzzer indicates stud edge* High impact, ergonomically designed ABS case