ThermaCELL mosquito Repellalent. Repels mosquitoes and black flies. Provides 225 square feet of repellancy.Use for camping, hunting, backyards and spectator sports. Both work. One refill box still factory sealed. Both have leg straps carrying cases. I don't early season Archery hunt anymore. Have no need for them. $30.00 ea. Or $50.00 for both.