Identify af / at Standard Automatically Inline Power Testing Test the short circuit, crossover and open circuit status for STP, UTP lan cable. 【Loopback Testing】Test the loop circuit connected to switch is normal or not. A lamp is equipped in main unit, helps work in darkness. Color Multicolored Model G-NF-488 Brand Name GuliTech Style Name Cable and Network tester Unit Count 1.0 Count Item Weight 0.5 Kilograms Manufacturer NOYAFA Power Source Battery Powered Item Dimensions 8.66 x 5.91 x 4.72 inches Specification Met EMC, ISO 9001, RoHS Included Components NF-488 Warranty Description 1 year warranty Upper Temperature Rating 50 Degrees Celsius EU Spare Part Availability Duration 1 Years