Hikvision 433MHz Two-way Wireless Keyfob DS-PKF1-WB

<table border="1" cellpadding="6" cellspacing="0" width="100%">
  <tr>
    <th colspan="2">Wireless Transmission</th>
  </tr>
  <tr>
    <td>RF Frequency</td>
    <td>433 MHz</td>
  </tr>
  <tr>
    <td>RF Modulation</td>
    <td>2GFSK</td>
  </tr>
  <tr>
    <td>RF Distance</td>
    <td>500 m (open area)</td>
  </tr>

  <tr>
    <th colspan="2">Electrical Characteristics</th>
  </tr>
  <tr>
    <td>Operation Humidity</td>
    <td>10% to 90% (No condensing)</td>
  </tr>
  <tr>
    <td>Operation Temperature</td>
    <td>-10 °C to +55 °C (-4 °F to +122 °F)</td>
  </tr>
  <tr>
    <td>Battery Life Span</td>
    <td>Up to 3 years (standby time)</td>
  </tr>

  <tr>
    <th colspan="2">General</th>
  </tr>
  <tr>
    <td>Shell Material</td>
    <td>Panel (Plastic) + Gasket (Rubber)</td>
  </tr>
  <tr>
    <td>Color</td>
    <td>White</td>
  </tr>
  <tr>
    <td>Weight</td>
    <td>16 g (5.64 oz)</td>
  </tr>
</table>