Liquid-filled bearing compass.Luminous printing is used on the card to indicate the main direction.Large side reading window. The rotating bezel determines the direction in 10 degree increments.Can be clamped to the watch strap, sleeve, backpack strap, map side, etc.Super compact and fun auxiliary tool, suitable for underwater navigation.The original intention of the product design is to be more portable, it can be assembled immediately when needed, and can be removed when not needed.This watch compass has a toothed buckle, which can be firmly buckled on the strap and webbing and removed at will.Weight: 4.5gWaterproof, not sensitive to water pressure.Battery type, no need to use batteries.Compass accuracy is about 15°Compass resolution 10"Ordinary plastic oil-filled compass uses ambient temperature, temperature -5°C.Ordinary plastic oil-free compass uses ambient temperature, temperature -10°C.Professional customized compass high temperature, high temperature -40°C.Consumer reminder: Users need to have received diving training, have the ability and knowledge of safe diving, and choose safe waters and appropriate depths.It is recommended to conduct diving activities accompanied by professionals.