●plastic ●Imported ●DURABLE AND COMPACT: Wrist strap design, measuring 2.56*2.56*1.38 inches and weighing 0.25lbs,strap is adjustable to fit the wrist it is a professional diving compass. ●UNIQUE DESIGN: side-window reader with magnification, reads from the side for easy underwater navigation. Luminous and rotatable dial, wrist strap design, can work quickly in diving environment. Highly accurate and waterproof. ●MULTIFUNCTIONAL: Floating compass dial, 360° scale, accurate reading from multiple angles, waterproof and shockproof. ●SUITABLE FOR ACTIVITIES: Ideal for diving, surfing, locating and other activities. ●READY TO BUY: AOFAR factory direct selling. Provide two year VIP warranty and lifetime customer support.