Only Hikvision, baat rahi service ki to dahua ke product warranty year me sahi service milte hai, out of warranty cash me service center accept bhi nhi karti hai, or hikvision me sabse pahle accept Kiya jata hai cash ko, uske baad solution Diya jata hai out of warranty cash me to without any charges repair kar Diya jata hai, or last ye ki dahua ki security 0 hai hikvision ki 💯% safe