Klein Tools Multimeter Test Kit contains Cat. No. MM300 (Manual-Ranging Digital Multimeter) Cat. No. NCVT1P (Non-Contact Voltage Tester) and Cat. No. RT105 (Receptacle Tester). The MM300 measures DC current AC/DC voltage and resistance. The NCVT1P automatically detects standard voltage in cables cords circuit breakers lighting fixtures switches outlets and wires. The RT105 detects the most common wiring problems in standard receptacles.