Once you wrap it on both your arm and your weapon they glow and the arm band is only visible when wielding your weapon you have a bond with the weapon and can track it and recall it when thrown or dropped but it always comes back you can NOT leave it if you leave it In a bag of holding or somewhere where you will get it again it is nullified but you lose the bonuses Wich are if it's two handed one hand will work  and the weapon grip can blend in to the weapon

Notes: You can use: 1c:you twirl your weapon and do it attack target makes a dex save or falls prone 2c: prepare strike as a action you prepare if you get hit you hit back using the weapons attack then the effect is over max 10 rounds 4c: cleave through a object by succeed a dex or strength check DC goes up depending on weapon 5c: cleave through enemies.... Armor there armor class becomes 6 10c: triple backflip into leg sweep into attack flip over backslash slide slash kneecaps roll to hit for leg sweep succeed roll half damage prone roll to hit backslash roll to hit then damage kneecaps roll to hit and damage they are immobile if you hit 2 or more they are dazed, You wrap it on your weapon for a grip and you wrap it on your dominant hand as a arm band