All- Sun EM5812 This cable length meter can be used to measure spooled wire (or cable).  After you connect the meter to the two ends of the wire to be measured, the display will indicate the length of the wire quickly.  In addition, the meter can measure resistance accurately.  It Is a very useful tool for wire/cable retailer, electricity department,electrical contractors, building trades, and etc.  Features  * Built in buzzer, backlight and 4 1/2-digit display  * Reads in feet and meters  * Measures copper and aluminum cables  * 20 pre-set wire gauge settings (0.15mm² - 240mm²）, 8 memory locations in user select mode  * Automatic temperature compensation  Specification Specification Length Measurement Range: 0-100kft, or 0 - 30km  Length Measuring Ranges: 1000m / 10000m / 30km, or 1000ft / 10000ft / 100kft  Length Resolution: 0.1m / 1m /0.01km, or 0.1ft/ 1ft / 0.01kft  Length Measurement Accuracy: ±(1% rdg + 3ft or 1m)  Resistance Measurement Range: 0.1mΩ---1999.9Ω  Resistance Measuring Ranges:200mΩ/2Ω / 20Ω / 200Ω / 2000Ω  Resistance Resolution: 0.01mΩ/0.1mΩ / 0.001Ω / 0.01Ω / 0.1Ω  Resistance Measuring Accuracy: ±(1% rdg + 3 digits)  Temperature Measurement Range: 0℃ to 40℃  Temperature Measurement Accuracy: ± 1.5℃  Overload Protection: Max. 50V between terminals  Sample Wire Length in User Select Mode: 16.0-320.0ft, or 5.0-100.0m  Sleep Mode: The meter goes into Sleep Mode after about 10 minutes of inactivity, the sleep current is about 10μA.  Battery: 1.5V battery, AA or equivvalent, 6 pieces (Battery not provided by seller)  Operating Current: About 5mA when there is no object being tested and the backlight and built- in buzzer are off  Accessories Small bag as a container for All-Sun  EM5812 including in purchasing with two aligator clips ( red & black) and manual book