Unit Dimensions: 2.4375" W x 3.8125" H x 1.53125" L Features: Waterproof, 22 programmable channels for land use, Auto WX scan and WX Alert function (U.S.A. version only), Simple Up/Down switches for operating channel selection, Instant access to Ch. 16 and Ch. 9 (or call channel), Simple add/delete TAG scanning operation, 2 step power saver, 4 level battery indicator, Self check function checks internal temperature, connected battery voltage (over voltage detection), and water intrusion.