Nite Ize - SpotLit White Disc-O Flashlight. Model: N00804. 2" x 1 1/4". Strong, stainless-steel spring clip attaches easily to zipper pulls, dog collars, key chains and more. Squeeze once to engage constant glow, twice for flash mode. Water-resistant design protects light for use in wet conditions. Includes two long-lasting, replaceable batteries."