double LCD, convent for using, billing function, the LCD will show the talk time and sum. Fixed Wireless Payphone Basic Configuration1. Supporting GSM 850/900/1800/1900MHz.2. Double LCD, convent for using.3. Billing function, the LCD will show the talk time and sum according to the rate .4. With billing indicator function.5. Subtotal function, the LCD can show the total sum after several calls.6. ...