This Dual SIM GSM Desk Phone which has the latest technology in its design can wirelessly connect to GSM communications network directly by wireless method. The operation method of this product is just like normal wired telephone sets. It is the best choice for wireless communications. Attention in case of emergency, you can use this telephone to call. Receive and send messages with SIM card and fixed platform. Supports phone book between backup function, GSM 900-1800MHz, handle or hands-free conversations, standard TNC antenna & contains indoor antennas, support 10 kinds of 64 chord phone ring. Main function is high quality speech.