Features:
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.

Specification:
Condition: 100% Brand New
Material: Zinc Alloy
Color: As Picture Shown
Wire: 4 Wires.
External Dameter: 37mm
Package Weight: Approx. 37g/1.3oz

Package List:
1 * iButton Probe Reader