NXP Semiconductors KW40, User Manual, Page: 3 / 11

Unboxing
KW40 Heart Rate Monitor Using Bluetooth Low Energy, User's Guide, Rev. 0, 10/2015
Freescale Semiconductor, Inc. 3
Figure 2. BLE heart rate monitor board
3. Unboxing
The demo kit contains two items: the main board and a LIR3048 coin-cell battery. The coin-cell battery
must be placed in the main board’s battery holder before you use the device.
Figure 3 shows position of
the battery.
Figure 3. Battery placement
After you have inserted the battery, the device will enter a battery retention mode. It can now interact
with the user interface components.