The PB-1 three star pocket beeper affords the operator quick discernment of point-to-point continuity. As a transistor and diode tester, it analyzes "in circuit' junctions for go-no/go normality. It indicates leakage, shorted or open conditions of transistors. Product Categories: Test Equipment - Pocket Beeper Application: Quick discernment of point-to-point continuity Size (Tip Width x Tip Height): n/a x n/a Body Width x Body Height: 3" (75mm) x 4" (100mm) Tip Angle: Straight OAL: 1.5" (37.5mm) Weight: 6 Ounces Max per Carton: 1 Country of Origin: USA