Kimdrox Ohm Meter Resistance Voltage Tester Ohm Reader 808D 510 Digital 0-20 Ohm 0-12 Volt Guage Red LED Display LED display, 3 in 1 nut connector Input voltage: DC 5V Test range: 0.00 to 20.00 ohms. Test battery pole voltage, test range: 0.00 ~ 12.00V Requires 2 X AA batteries. Not included.