1). LED Wall Mounted Pool Light can be single color, and RGB color.
Single color: Warm white, and pure white. if you choose this kind, there is no remote controller with it.
RGB color: you can change its color by remote controller on hand.
You can see if the lamp is in single color or RGB color from subject.
2). We have 2 big series of LED Pool Light, PAR56 Pool Light, and Wall Mounted Pool Light. PAR56 Pool Light This one you need to install the par56 pool lamp into a housing, just like put LED T8 tube on its own holder, and then dig a hole according the size of housing on pool wall, after that, you can install the whole fixture into the hole. The complete fixture= PAR56 Pool Lamp+housing+12V transformer. Frankly, LED PAR56 Pool Light is designed to replace Halogen PAR56 300W, if you already have housing and transformer, you only need to buy the PAR56 Lamp. LED Wall Mounted Pool Light This one is installed on the pool wall SURFACE, not needing digging a hole, and the lamp you purchase from us already includes its own accessories(a pvc board), then you only need to drill the pvc board on surface of wall, and then install the lamp on it. if you buy it from us, there is a manual with the lamps in packing box. Anyway, because of needing to drill 2 screws on pool wall, so you need to consider which pool can do it before buying.