The MTP8000Ex series intrinsically safe TETRA portable radios are GCAI Accessory Connector T-Bar Grip The MTP8500Ex has a limited keypad, ideally suited for use while wearing heavy gloves. For users that need a full keypad we offer the MTP8550Ex. certified to the latest standards listed by ATEX and IECEx. They have been carefully engineered to address workers’ needs and provide reliable and efficient communications in hazardous environments.