Wrist compass with hose mount Large, easy-to-read numbers are displayed on the luminescent dial face and in the side window with index marks at 10-degree increments Oil-filled for precision operation to depths of 260-feet (80m) The special design of the compass needle card and powerful magnets provides smooth movement across a wide range of motion Compass can be worn either on the wrist or mounted to any scuba diving HP hose with hose mount bracket for standard diameter hose