... kits--Hotting ecig characteristics : 1. working voltage from 3.0V to 6.0V,2. Can test Atomizer's resistance, ... black and white)11. size:L 137mm* D 22mm How to use: 1. Click the biggest button 5 times,the light ... be the largest once the voltage is 6.0v.3. Keep pressing the + button more than 3sec, ... the shipment. 2.Certificates available: CE, RoHS, SGS 3.Terms of payment: PayPal, western union, T/T Best ...