Hikvision Panic Button DS-PD1-EB

<table border="1" cellpadding="6" cellspacing="0">
  <tr>
    <td>Product Type</td>
    <td>Panic Button</td>
  </tr>
  <tr>
    <td>Transmission frequency</td>
    <td>433 MHz</td>
  </tr>
  <tr>
    <td>Transmission method</td>
    <td>Two-way wireless, AES-128 encryption</td>
  </tr>
  <tr>
    <td>Battery / Transmission Range</td>
    <td>800 m</td>
  </tr>
  <tr>
    <td>Standard battery life</td>
    <td>2 years</td>
  </tr>
  <tr>
    <td>LED indicator</td>
    <td>Red : Alarm</td>
  </tr>
  <tr>
    <td>Operation temperature</td>
    <td>-10 °C to +55 °C</td>
  </tr>
  <tr>
    <td>Dimension (W × H × D)</td>
    <td>63.8 × 63.8 × 17.9 mm</td>
  </tr>
  <tr>
    <td>Weight</td>
    <td>46 g</td>
  </tr>
  <tr>
    <td>Installation</td>
    <td>Wall mount, indoor</td>
  </tr>
</table>