1.no leak, easy to fill 2. long wick, avoid any burnt taste 3. two air inlet holes, making smoke more smoothly 4. great vapor 1. The CE4 V2 clearomizers is the hottest and latest2. No leak, Easy to fill,clean, Big vapor, New design.3.Clean taste and great vapor4.Easy to refill ejuice5.Ejuice level visible6.Fit most batteries with 510/eGo threading like riva/ego-t/ego-c/ego-wModel: CE4 V2 ...