Rfid Reader Module By Dwell Electronics Co., Limited

Designed for embedding into products manufactured by third-parties, the
M4100 Module is a 125kHz low cost RFID reader module in a
printed circuit board form factor.

Its features are:

Reads EM4100 compatible transponders.
Read Distance: 5cm for cards, and 4cm for keytags.

Small Unit size: 20mm x 30mm x5mm

On board duel color LED (Red/Green).

On board buzzer.

Integrated RFID coil antenna.

The M4100 is designed to read the popular range of EM4100
compatible proximity cards and transponders available on the general market

Output format optional:WG26,WG34,RS232