Steady-going power function, the outpt vlotage keep in 200-230 from blank frequency to loadenSafeguard function complete: Inculding output overload and safeguard of short circuit, and safeguard of inp

GSM public payphone is one of the wireless phones which is approved for use on the 900mhz-1800mhz networks.it has the features of strong signal reception,exceptional conversation qualith,seady paramet

GSM public payphone is approved for use on the 900-1800mhz GSM wireless communication networks.It`s in imitation of the operation profiles of the corded phone.The terminal has the safety funcion of lo