If you're fed up with the size of Vv mod, you may consider iMotion Mini to keep the function of rotating bottom knob for voltage adjustment just as EGO-Twist.
Your trial is welcome.
IMotion mini Features:
Features:
1 Variable Voltage: 3.0V~5.0V, by rotating the knob at the bottom;
2 LCD Screen show output voltage and electric quantity;
3 Protection system against over current/short-circuit situations;
4 Standby current is lower 30uAh;
5 Smart in size and appearance;
6 900mAh rechargeable battery;
User guide:
Assembly the battery and cartomizer with smoke juice correctly.
1 Press the smoking button 5 times in 3s, the device is turned on or turned off;
2 The LED on the smoking button is lighted while you smoke by press the button, and it shall turn off when you stop smoking;
3 Knob switch at the bottom adjusting the voltage in a circle of 3.0V~5.0V with 0.1 volt increments;
4 The LCD Screen display and electric quantity and the voltage, for example, 3.7V will display “3.7U” (+/-0.2V);
5 Connect the USB line to charger the battery, the LCD blinks 3 times, the device starts charging, the battery indicator shall be moving, and the LCD screen shall be turned off when it is full charge;
6 One vaping lasting time is within 10 seconds, or else, the device shall come to standby status;
7 When the battery voltage is lower 3.3V(+/-0.2V), the blank battery indicator shall blink 15 times, and the device stops working;
8 Short circuit protection: LCD Screen shows “F2”;
2013 LCD Display with knob switch Mini VV Ecig Imotion Mini