iButton Probe Reader with LED Indicator

1 Made of zinc alloy material, high conductivity, ensure accurate data transfer. 2 Chrome-plated contacts, effectively prevent LED from oxidation. 3 Reading and writing Dallas key card. Easy to install on doors. 4 With LED lights, for easy reading card at night. 5 Total 4 wires, including 2 signal wires and 2 indicator light wires.

What's in the box
1 x iButton Probe Reader