Just attach it to the wall of the bath with a strong magnet. You can watch your smartphone face in front while you are in the bath. Silicone cushion on the surface prevents your smartphone from slipping. It can hold large smartphones up to 6.5 inches (16.5 cm). Can be placed on either side or left side. It has drainage holes so it can drain well. ■ Size (W x D x H): 3.1 x 6.7 x 4.7 inches (8 x 17 x 12 cm); Weight: 10.6 oz (300 g); Material: Body: Steel (unichrome plating + powder coating), Magnet, Anti-slip, Cushion/Silicone; Load Capacity: 17.6 oz (500 g); Country of Origin: MadeinChina; Compatible Size: Smartphone Size: Smartphone with smartphones up to about 16 cm) tall, flat surfaces with magnet; Steel walls.