Description: A compass that can effectively reduce directional errors, can be more accurate because of the precision internal scale ring teeth, and can point south of the magnetic field because of the triangular indicator arrow. More convenient to read the compass orientation data, because of the small window and red reference line on the side, and is liquid-filled light-absorbing, can absorb sunlight, light and other light sources, in the dark conditions emit luminescence. Made of high quality ABS and plexiglass materials, it is durable. The length of the compass is 6.5cm, the width is 6.5cm, and the height is 3.6cm. The length of the strap is 37.3cm, the width is 3.6cm. This compass is suitable for water sport, swimming pool, home, etc. Item Name: Compass Material: ABS,Plexiglass Underwater Working Temperature: -30 Degrees Celsius ~ +60 Degrees Celsius Storage Temperature: -22 Degrees Fahrenheit ~ +140 Degrees Fahrenheit Underwater Dive Depth: 50m Feature: Easy to Apply, Rounded Corners, Convenient Size Details: Compass Size: 6.5cm x 6.5cm x 3.6cm/2.56" x 2.56" x 1.42" (Approx.) Strap Size: 37.3cm x 3.6cm/14.69" x 1.42" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Compass 1 x Strap 1 x User Manual