I purchased one fixed gsm sim phoneModel number is FWP F1Its no robust construction compared to panasonic .Loud enough ring tone for elders . Voice clarity is amazing . It has 1000 mAh Li-ion battery , at cheap price it should have NiMh battery . Its desgined to use at home and battery power sufficient for the purpose .the other can needs to mention the crodel is not properly grooved to hold the reciver instantly , buttons need to improve .Navigation easily while saving contacts into the phonebook is not easy . The important thing to mention there is newer version F1N . For elder in your house , this bettel product provide tha advantage of a wired phone loaded with the all features of GSM mobileAll product is goods buy any product from your requirement.