... , 4AD inputs; Microphone and Speaker; GSM Alarm system New Program Software Released!More Easier,More Professional,More Reliable!The GSM Controller ... Different from RTU5010 is the GSM Controller RTU5011with 8 Digital NC/NO inputs,8 relay drivable Outputs, 4 Analog inputs, ... . The GSM Controller RTU5010 with 4 I/O ports, without AD inputs, Microphone and Speaker. The other functions are the same ...