Portable Oxygen Concentrator HPT-10

https://www.cantamedical.com/products/hpt-10-portable-oxygen-concentrator/

This product can be used for field work, especially in high altitude areas, and can be up to 4800meters.
It consists of a compressor, filter, molecular sieve adsorption separation device, radiator, control system, flow control system, lithium-ion battery pack, and so on.