Theodolites are modern and precise optical instruments widely used to measure angles between the designated visible points in different planes from horizontal to vertical. They are employed in land surveying, infrastructure, construction, meteorology and other scoters. These devices are provided with state of the art glass encoder along with accurate dual LCD panels having large and easy-to-read numbers. They are also proved with vertical tilt sensor to accurately and easily monitor the tilt angle in x-axis. With auto power-off option, they shut off in- 20 minutes, when the devices are not moved. Moreover, they come with rechargeable battery pack