The UT681 series of portable cable testers can quickly test Ethernet/telephone/BNC/HDMI cables for conductivity, shorts, crossovers or open circuits. These are ideal tools for technicians to install, maintain and test the current system circuit. Specification: Purpose: HDMI, mini HDMI cable Number of lines read: LED1 ~ LED19, LED_S Quick scan test / Full scan test: LED1 ~ LED19, LED_S Check for short circuit, open circuit, cable crossing, etc. Manual/automatic shutdown. Power supply: 9 V. Low battery indicator: Less than 7.2 V. Dimensions: Transmitter 102 x 62 x 28 mm; Receiver 102 x 37 x 28 mm Weight: Transmitter 87 g; Receiver 51 g Operating temperature and humidity: 0 ~ 40 °C; 20 ~ 80 % relative humidity. Storage temperature and humidity: -10 ~ 50 °C; 10 ~ 90 % RH Operating altitude: Max. 2000 m above sea level. Certificates: CE EN61326-1: 2013; EN61326-2-2: 2013 Accessories: 9 V battery.