
Gigaset E720 (CH-Version)

Gigaset E720 (CH-Version)
I have Swisscom router 3 and 3 gigaset cordless phones. My SL450HX Gigaset device is faulty. What should I buy now: ? E720HX or E720 (CH version). Is HX important or is the CH version absolutely necessary? Thanks for the answer.