Features:

1) High level standardization: metal sealed patent LED module set
2) LED modules Mobil currently uses for their Price Changing Units 

3) These are meant to work with remotely-controlled unit for changinjg the day-to-day prices, either with infra-red or radio frequwency (ie. wireless)

4) Solid LED module with stable structure and easy for installment or  transportation

5) Low voltage and safe, power-saving