dk 304 solo vs dk 22x dk 304 TX WS 4 5 10 W3 dk 22x RD k biet ws hay k W3 con lai do tuong duong nhau the ma solo dk 304 lai thua ti so cach biet??? dk 304 pk cung k phai ga lam the ma .... pro nao chi giup k? tang mau am am ma cung k tru dc