Specifications:<br />Condition: 100% brand new<br />Color: Gold / Silver (optional)<br />Outdoor power supply: 4 * AAA battery (not included)<br />Indoor unit power supply: Built-in lithium battery<br />Indoor unit input voltage: 5V-1A<br />Material: Plastic + electronic components<br />Operating temperature: -20 ¡æ to 55 ¡æ<br />Receive/transmit frequency: 467.6375MHz<br />Transmission distance: Open area: 300 meters， barrier: 50-100 meters <br />Waterproof: NO waterproof function<br />Outdoor unit working time: More than six months<br />Indoor unit working hours: 48 hours<br />Indoor/outdoor unit size: 10*6*1.5cm  <br /><br />Package includes:<br />1x Indoor unit <br />1x Outdoor unit <br />1x Screwdriver <br />1x Double-sided  adhesive<br />1x Micro USB charging cable <br />1x English user manual