Floating Multicolored Led Pebble Pool Lights (Set of 2) What we have here are buoyant white plastic blobs that look like big, smooth white beach rocks but with internal red, green and blue LEDs. (7) steady-state modes and (1) oscillating setting. And they float, so they're perfect for pool-party ambiance or amusing the frogs in your water feature. Auto shut-off at (4) hours. Includes (4) coin cell batteries. Our each is a pair of pebbles. Approx 5-3/4" x 3-7/8" x 1-5/8" thick