Product Pic	Product Model	Function Summarize
	GFM510B (Single)	LCD display the current Oxygen flow; accumulates Oxygen volume; accumulates Oxygen using time; reset by password or key. plug and play. Two batteries for using 2 years.
	GFM510C (for network)	Same function with GFM510B. Add remote reset; Time Over surpasses range warning, Available for LAN.
	GFM-01 (Traditional I)	The creation is fine, safety dependable.
	GFM-02 (Traditional II)	The creation is fine, safety dependable.