Working in the potentially harsh environments such as construction sites, harbors, manufacturing or petrochemical plants, etc., where need a reliable and durable two-way radio to guarantee safety and enhance working efficiency. DMR portable radio TP620 and TP660 provide super audio quality, versatile functionality, durability, security and flexibility to solve problems confronted in the work area, creating great operating value. ·Rugged Design TP620/TP660 is strictly designed to meet IP67 and MIL- 810C/D/E/F/G standard, ensuring good performance in potentially harsh environments such as harbors, manufacturing plants, construction sites, and etc. ·Durable Battery Two-time slot transmission reduces transmit time in half and thus increases talk time longevity. 2000mAh battery supplied in standard package ensures at least 14 continuous working hours in analog mode and 16 hours in digital mode. ·Improved Audio Quality Digital error-correction technology rejects noise and static, providing consistent audio quality throughout the coverage area and even in challenging low-lying areas. AMBE+2TM vocoder further improves speech communication. 1.6W audio output and a 40mm diameter powerful speaker ensure louder and crisper voice communication. ·Higher Channel Capacity TP620/TP660 can work with a single repeater to achieve twice the traffic capacity without relicensing or rebanding, meaning two voice communications or one voice communication and one data transmission can transmit at the same time in one channel. ·Migrate at Your Own Pace TP620/TP660 radio can operate in both analog and digital mode by channel switching or mixed mode scanning. TP620/TP660 can be used on existing analog system and allows you to make smooth migration into digital era at your own pace. ·Versatile Services TP620/TP660 provides versatile services including individual call, all call, group call, emergency call, radio enable & disable, remote monitor, radio check, call alert, facilitating high-efficient communication and management. ·Text Message When it is not convenient to have voice communication, text message offers a quiet communication choice. You can choose one of the maximum 50 preset messages to initiate a quick transmission or write a free-form message with keypad. ·Secure Communication The 16-bit digital encryption technology ensures the communication can only be heard by preset group members.