Techno Line WT268 Instruction Manual page 24

Getting started
- Open the battery compartment cover and insert 2 x AAA batteries
under
Environmental reception effects
The clock obtains the accurate time with wireless technology. Same
as all wireless devices, the reception is maybe affected by the
following circumstances:
long transmitting distance
nearby mountains and valleys
near freeway, railway, airports, high voltage cable etc.
near construction site
among tall buildings