... . It is characterized by high electromagnetism transfer efficiency, low power consumption, diversfied ways of surficial treatment, adopting SAW stable ... 303MHz ,310MHz, 315MHz,433MHz (choice)(4) frequency windage: ≤±150KHztransmit power: 8mWCapability characteristics:high stability: adopting imported SMT component,SAW and ... ” printed at the end of types are rolling code. long range wireless transmitter