Features: This professional automotive circuit tester/circuit test light with 6-24V for DC voltage testing range. LED light indicator: red light indicates positive polarity and green light indicates negative polarity. for Ideal for checking various vehicles electrical circuits, quickly check automotive headlights, taillights, turn signal circuits, faulty sockets. Sharp- metal probe for piercing wires, also for hard to reach tight areas. Insulation protective rubber tip protects you against electric shock. Heavy duty test light body constructed with high quality PC & rubber, shatter-proof, more durable than normal test lights. Specifications: Length: approx 220mm/8.7in Cable stretch to: 3.2m Power supply: DC6-24V Operating temperature: 0-50ºC Working humidity: less than 80% Package Includes: 1x LED Circuit Tester note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.