The clamshell design of this easy to use mobile phone makes it impossible for numbers to be dialled or functions switched on when you slip it into your handbag or pocket hearing aid compatible with a loud adjustable handset volume up to 30db this dual band gsm model is a fully functional flip style phone it also features an sos button for emergencies that sends out a pre recorded voice message when activatedlarge font colour displayloud ringer up to 80dbvibration alert for incoming calls300