PT3600 is the latest professional model designed with light but strong and durable structure. Its high-capacity Li-ion battery, Flash IC, PTT ID can meet your needs in versatile applications. Large inner audio cavity speaker gives you a crisp clear voice communication. Compact Size and Light Weight Enhanced Voice Quality Long Working Time DTMF Encode&PTT ID ■ Compact Size and Light Weight Compact design allows PT3600 radio easy to carry. ■ Enhanced Voice Quality It employs advanced voice technologies and 1W audio output to improve the sound quality during your communication. ■ Easy to Use PT3600 includes volume and channel knobs, orange emergency button and tri-color status LED. In addition, two programmable buttons can improve use experience and increase operating efficiency. • Keep in Touch High power and low power are available, for different communication coverage needs. In addition, it is with wide frequency coverage including 136-174MHz, 400~470MHz, 450~520MHz, and 330~390MHz. ■ Long Working Time Low emission power and receiving current provide 14 hours working time. • PTTID PTT ID uses DTMF code. It is used to inform the caller's ID to the control center, or to active a repeater. • Flash IC Flash IC function enables the annunciation custom-tailored.