Very Reliable - Very accurate - Very secure - Guaranteed two years!

How it works?                          
example: The Landlord buys:  1. A card-meter  2. A programming card  3. 100 x £5 cards
He sells the tenant a £5.00 card.   The tenant uses the card then throws it away.
The Landlord puts the £5.00 towards his utility bill.(link here for more details)

  £35.65 each includes vat and next-day delivery