Supports up to 15 watt wireless charging; iOS and Android compatible (Qi-enabled devices); Fast charge capable; Waterproof electronics; Soft rubber lined foot and arms provide stability and prevent slipping; Black nylon components; Adjustable foot base to accommodate a wide variety of phone; Quickly lock your phone in place and release it with one finger; Expandable from 2-3/8" to 4" wide; GEN 2 ball and socket design