Mullion mount prox reader. Dimensions: 6.0 in. x 1.7 in. x 1.0 in. (15.2 x 4.3 x 1.91 cm) Typical maximum read range: (Depending on local installation conditions) ProxCard in. II card - up to 5.5 in. (14 cm) ISOProx in. II card - up to 5 in. (12.5 cm) DuoProx in. II card in. up to 5 in. (12.5 cm) ProxKey in. II keyfob - up to 2 in. (5 cm) ProxCard Plus in. card - up to 2 in. (5 cm) Smart ISO/DuoProx in. cards in. up to 5 in. (12.5 cm) Proximity & MIFARE in. card - up to 5 in. (12.5 cm)