DDK Dual SIM CARD GSM Corded Telephone Set This Dual SIM Huawei is a GSM wireless telephone set which has the latest technology in its design. It can wirelessly connect to GSM mobile 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 phonebook between backup function, GSM 9001800MHz, handle or hands-free conversations, standard TNC antenna & contains indoor antennas. Main function is high quality speech.