F108A is only a small selection of ringtones large.
There are two kinds of ringtones F108 is selected

Type: a transmitter， a receiver， a transmitter battery
● Accessories: 12V 23A transmitter built an alkaline battery

AC-line power supply;
Radio digital signal receiver， the encrypted interference;
Built-in speakers， effective dust pronounced rebound， softer tones;
White home with color， more fitting decoration environment