The Tetrad QS-4 blaster features 4-dart blasting, unleashes 4 darts in a row, and has a targeting sight and pull-back priming handle. The Quadfire QS-4 blaster has a 4-dart capacity to unleash 4 darts in a row, a pull-back priming handle, and a targeting sight for aiming. The Ace SD-1 blaster launches 1 dart, has a pull-down priming handle, and a targeting sight that doubles as onboard storage for 1 dart. The set includes 10 Official Nerf Elite foam darts to fully load each blaster. Eyewear is recommended (not included). No batteries are required.