thermometer-hygrometer inquiry

anyone use this model from ambientweather.com?

i know alot of people here like the accu-rite & i'm just researching stuff for future set ups.

would this unit be able to be put through the salt test to determine its % accuracy like the accu-rite?

& can someone translate the specs info for me? i understand the temp & humidity ranges & i dont have a problem reading but theres some kind of funky lookin' symbol there that i have no idea what that is supposed to mean...

http://i280.photobucket.com/albums/k...ohygrounit.gif

info:
Ambient Weather WS-HT01 Jumbo Display Thermometer-Hygrometer with Clock $7.99

The WS-HT01 Jumbo Dislpay Thermometer and Hygrometer is easy to read and simple to use. The 1" LCD numbers display temperature and humidity.

Also includes clock with time alarm, and min/max with clear fuction.

Features / Specifications:

Temperature:
Range: -58 to 158 °F (-50 to 70 °C)
Accuracy: ± 1.8 °F (± 1.0 °C)
Resolution: 0.1 °F / °C
Humidity:
Range: 10 to 99%
Accuracy: ± 5% from 40 to 80%
Resolution: 1%
Other Specications:
Console Dimensions: 4.2 x 3.8 x 0.9 in (106 x 98 x 22 mm)
Display Dimensions: 3.2" x 2.4" (81 mm x 61 mm)
Response Time: %RH: 10 seconds for stabilization in still air, temperature < 0.4 seconds
Storage Conditions: -4 °F to 140 °F (-20 °C to 60 °C); <80% RH non-condensing
Power: One standard 1.5V, AAA battery (included)
Weight: 0.35 lbs (160g)
Desktop or Wall Mount
CE and FCC Certified

You should be able to check most any hygrometers accuracy by using the salt test method. The symbol I think you are referring to is this one ±. It is just two symbols stuck together, and is another way of saying "plus or minus". Sometimes it will be shown as "+ or -" or, more comonly "+/-".

oh ok yeah...i've just never really seen that symbol before so it kinda stumped me, lol. i'm not the brightest nut in the shell sorry.
i know it very well as "+/-".
isnt it supposed to read 75% after 24 hrs of the salt test? wheres that sticky so i can go back & re-read it, lol?
like my accu-rite is 9% off (did the 24 hr salt test on it) so whenever i'm noting the humidity i have to count back 9% to get the accurate reading.