1.IPRO F183S is a brand-new product ,It own a 800mAh battery which can last for several days. 2.F183 have keys are extremely large and easy to read, though you can also set the phone to say them out loud as you press them, which is a nice feature for those with diminished eyesight. 3.Safety is something that is of prime importance for older people. F183 comes with a feature that will give real peace of mind to the user, as well as family members who are concerned about their well-being. This is a dedicated SOS number that can be used in case of an emergency. 4.Welcome OEM order(logo, boot up screen, customized packaging...)