Backwards compatible with gm47 / gm48 and gr47 / gr48 radio Devices for convenience and speed Powerful and fast enabling complex Or time critical applications Minimize total solution cost by Embedding application directly Onto gr64 Optimized for global m2m Communications, the gr64 is a quad Band (850 / 900 / 1800 / 1900) GSM / GPRS Class 10 compact radio device. Backward compatible with the Sony Ericsson gm47 / gm48 and gr47 / gr48 radio devices, the gr64 offers A broad range of voice and data Features. Its intrinsic TCP/ IP stack Enables customers to make effective Use of GPRS. The gr64 is configurable And possesses an extended range of Input / output capabilities.