Material: environmentally friendly resin 

(natural and environmentally friendly, no odor, heavy and feels good, does not fade, and is insoluble in water), 

silicone glue key, alloy dial and bracket

A Wireless telecommunication card version-button;

B Handsfree: Push-button dial, time calendar display, redial, hands-free dialing, caller ID
C Hands-free backlight: push-button dial, time calendar display, redial, hands-free dialing, caller ID, screen backlight (blue background light, clearer display)
D rotary dial version: rotary dial, hands-free, redial function