Active type. User can also trigger signal by pushing button.

Worked anywhere inside a car

Extra button for trigger transmit signal

˙  Operating frequency: 2.4GHz

˙  Transmission power: 1 dbm

˙  Dimension: 60mm (L) x 35mm (W) x 15mm (H)

˙  Battery specification: CR2032 x 2, replaceable

˙  Battery life: One year

˙  Option of build-in EM or Mifare card

˙  Operating temperature: -20ºC ~ 60ºC