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United Kingdom
Notice to the User: Regulatory content for this region can also be viewed on your device. To view the
content:
Settings Device Info Regulatory Info
Simplified UK Declaration of Conformity
Hereby, Fitbit LLC declares that the radio equipment type Model FB421 is in compliance with Radio
Equipment Regulations 2017. The full text of the UK declaration of conformity is available at the
following internet address: www.fitbit.com/legal/safety-instructions
Vietnam
About the Battery
This unit contains a non-replaceable internal lithium-ion battery. The battery can burst or explode,
releasing hazardous chemicals. To reduce the risk of fire or burns, do not disassemble, crush, puncture
or dispose of in fire or water.
CAUTION: Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries
according to the instructions.
• The battery must be recycled or disposed of properly
• Use the battery only in the specified equipment