SECO-LARM PR-K1K1-AQ Proximity Keyfob - Compatible With PR-112S-A, SK-2323-SPQ and SK-1323-SPQ Proximity Readers - Small size 1-1/4&rdquo; x 1-1/2&rdquo; x 1/4&rdquo; (30x36x8 mm), Price is For Each Keyfob For use with PR-112S-A, SK-2323-SPQ and SK-1323-SPQ Proximity Readers Small size 1-1/4 x 1-1/2 x 1/4 (30x36x8 mm) Frequency: 125kHz (EM125)