another great feature of the sx350 chip, it saves 5 pre set wattages. so if you switch attys that vape at difrent wattages you just select the # and go. they can all be changed very easy. i am not missing the up / down button at all. now i am using a 38mm tobh with 26g kanthal duel coil for .3 ohm at 30.7 watts @ 3.46 volts.
great vape!!