Compact and high performing, the TX677 offers big features in a small package. The TX677 is a compact and lightweight mechanical design, with up to 20 hours battery life, convenient USB charging, a rotary power/ volume control for easy operation, switchable transmission power (2/ 0.5 watt), and a user programmable scan function, the TX677 is a serious performer in a compact chassis. Also available as a twin pack (TX677TP), and a quad pack (TX677QP).