Specification:
FEED WATER PRESSURE: 40 - 100 PSI
TEMPERATE:40-110°F/5-45°C
PH:3.0 -11.0
MAX TDS :1000 PPM
TURBIDITY MAX SDI HARDNESS Shelf life: 3 Years
Warranty: 1 year limited warranty

More valuable information:
✪What is dimension of installed Geekpure RO-100G-4 system?
RO unit: Length 14.80 inch, Width 9.2 inch, Height 3.2 inch.

✪What is 4 stage filter and function?
the 1st stage: PP spun filter, Remove sand, dirt, sediment.
the 2nd stage: Ro membrane, Removes up to 99% of contaminants including arsenic, chlorine, lead, fluoride, mercury, cadmium, odor, heavy metals, and 1000+ contaminants.
the 3rd stage: Coconut carbon filter, Remove chlorine, taste & odors, very fine particulates.
the 4th stage: Deionization Filter - Mixed bed DI filter is used to further remove TDS from membrane filtered water. It is a high capacity mixed bed ion exchange resin, guaranteed TDS value close 0 ppm.

✪Where can I buy replace filters?
Please search product ASIN B07KHWKVCS & B07G42FGJL on Amazon. There is not storage tank and faucet in the box. Because it is special design for aquarium use. If you need these extra parts, please search product ASIN B07DBZN79S or B07D9JKSLJ for tank, B078HTMHXV for faucet on Amazon and buy it separately.

✪ What is in the box?
1 RO unit, diverter valve, 1 piece wrench, RO tubes, clips, drain clamp, teflon tape, and so on.

✪BPA free?
Yes, BPA free, food grade materials.

Note:
Please keep flush filters 30 minutes before it is used to feed for your aquarium. It Is Normal for Some Black Carbon Fines to Appear When You Flush Carbon Filter. There is not tank and faucet, and high/low pressure switches,the system can not work on and off automatically. If you want to add tank, faucet, switches, please contact with seller.