Active Noise Cancelling Technology The built-in bidirectional active noise cancelling reduces background noise to up to 90% and improves both your transmitted voice and incoming call. You will hear better and clearer! Bass Boost Function The signal processing technology emphasizes low-pitched sound to provide a rich bass sound for both transmit and receive signals. 700mW Loud Audio The IC-M73 uses a BTL (bridge-tied load) amplifier that doubles the audio output. Its internal speaker delivers a loud 700mW audio output with clear sound. 6W RF Output Power The IC-M73's 6 Watts of transmit power will provide extended communication range for the user. A large capacity Lithium-Ion battery, BP-245H allows for 17 hours of operation, under normal conditions. The IC-M73 continues to offer Icom's best waterproof protection. The radio has been tested to survive after being submersed in 1.5m (4.9ft) depth of water for 30 minutes. Slim, Hourglass Body Wide Viewing Angle LCD The IC-M73 has a stylish, ergonomic design. A durable and rugged body provides user-friendly operation and long life. Additional features AquaQuake prevents audio degradation from a water-logged speaker Dual/Tri-Watch function for monitoring Channel 16 and/or call channel 4 level battery indicator Favorite channel and tag scan functions Rapid desktop charger, BC-210, and cigarette lighter cable, CP-25H, are supplied Auto power save function