Power supply
The nRF21540 EK must be powered by a PS1 class (IEC 62368-1) power supply with maximum power less than 15 W.
Skilled persons
The nRF21540 EK is intended for use only by skilled persons.
A skilled person is someone with relevant education or experience that enables them to identify potential hazards and takes appropriate action to reduce the risk of injury to themselves and others.
Operating temperature
The nRF21540 EK is designed to operate in room temperature environments from 0°C to +40°C.
Electrostatic discharge
The nRF21540 EK is susceptible to Electrostatic Discharge (ESD).
To avoid damage to your device, it should be used in an electrostatic free environment, such as a laboratory.