Passive type. User has to push button to trigger signal.
Battery life: One year
Option of build-in EM or Mifare card
˙ Operating frequency: 2.4GHz
˙ Transmission power: 1 dbm
˙ Dimension: 60mm(L) x 35mm(W) x 15mm(H)
˙ Battery specification: CR2032 x 2, replaceable
˙ Operating temperature: -20ºC ~ 60ºC