38mm x 20mm display size. Single row display. Massive 16mm digit height. Adjustable viewing angle. 5,4,1,0 ISAF start sequence pre-programmed with audible warning signals (can be silenced if preferred). Boom/Mast Mount Bracket Supplied. Elasticated Strap for Wrist or over sleeve wearing. Countdown repeat option or Countdown and Up to show elapsed time for handicap races. Large 65mm overall ABS case. Shock Resistant Construction. Water Resistant to 5 ATM.