Radarcan R-101 User Manual page 5

For options 2 or 3, detach the PORTABLE MOSQUITO
REPELLER from the band, as shown in Fig. 3.
Fig. 3.
The PORTABLE MOSQUITO REPELLER lasts forever, and the
battery lasts for 8 months (average use 4 hrs/day). When in
the "ON" position, it no longer emits a faint sound, replace
the battery, as shown in Fig. 4. Be sure to deposit the used
battery in a special storage or recycling container, according
to the established laws and regulations.