Features:
1) Power: 3 x 1.5V batteries (4.5V)
2) Static electric current: ?30uA
3) Warning electric current: ?7mA
4) Usage frequency: 315MHz?1MHz
5) Remote control distance: ?500m (with an uninterrupted view)
6) Survey angle:
a) Vertical angle: ?110o
b) Horizontal angle: ?5o
7) Survey distance: ?9m
8) Examining time: 60 seconds
9) Super strong stability
10) 0% mistake ratio