Arduino and 433mhz receiver

Using Arduino Sensors
5

if i buy this module, i'm ok?

http://www.ebay.it/itm/Modulo-wireless-RF-ttl-tx-rx-433-mhz-per-arduino-atmega-pic-parallax-/290750763608?pt=Componenti_elettronici_attivi&hash=item43b2189258

the sensors is like this:
http://www.ebay.it/itm/SENSORE-PORTE-E-FINESTRE-WIRELESS-X-ALLARMI-ANTIFURTO-433Mhz-/160839805604?pt=Antifurti&hash=item2572ccaaa4

please, reply me soon, because must buy the module