The patented (US Patent No. 10517291) FLOCK A FLICKER(TM) proved to be one of the most popular waterfowl hunting products to come along since the spinning wing decoy. WHY? Because they worked when used in multiple units as they mimic the random quick "flashes" or "strobe" given off by a flock of contented ducks sitting on the water or dry ground telling other ducks: It's OK to land here. If you observe a flock of contented ducks you will see these random "flashes" that rotate or flicker throughout the flock. MOJOA(R) has improved on this ground-breaking concept with the FLOCK A FLICKER(TM) 2 4-Pack including an upgraded housing with all other components same as the original which emits the same flash. With any spinning wing product faster is better and these blades (or wings) turn super fast. Packaged in a set of 4 add multiple sets to your spread for an ultra-realistic look.Features include:a Improved design with same great flash and super fast wingsa Re-designed seal around motor shafta Larger housing with gradually sloped topa New twist lock lid and heavy-duty gasketa Designed for water or dry fieldsa 4 separate pre-programmed units with intermittent on/off timers to give that "random look"a Removable magnetic wings with white side and brown side to create the "flash" or "strobe" effecta Two conveniently located eyelets on side and bottom of base for decoy rigginga Specially designed clips around housing to wrap / hold decoy line for storagea Soft touch on/off button is easy to depress in cold weather and with glovesa Raised finger tabs to aid in tightening lid for battery replacementa Operates up to 30 hours on 3 AA batteries