Sound where you need it, not at the waters edge where you dont! The first silent Reed remote alarm on the market, the ATTs works only with the V2 ATTx Receiver, giving wireless bite indication at up to 200m (in normal conditions). The smallest bite alarm to date (transmitter is built in). H 61mm x W 31mm x D 21mm. Simple to use no buttons, switches or knobs. 100% Waterproof with brass bolt and locking nut. Protective hard cover case with unique auto power-off function and low battery warning. Full 1 Year Gardner Warranty plus Second Year Extended ATT Warranty.