Voltage Stability brings Improved Performance * Checking Voltage gives Protection from Performance Loss ·Engine Torque ·Audio Quality ·Mileage ·Light Illinance ·Lower Voltage means Lower Quality Sound / Unstable Operation for all Electronic Devices ·Low Battery Charge ·Battery Life By simply inserting into the cigarette lighter socket, you can not only improve the performance of electronic devices by supplying a stable source of voltage, but it is also possible to check the current status visa the voltage meter. Our specially designed 1650μF condenser circuitry delivers a stable supply of voltage to your electronic devices to ensure improvement in performance. Voltage is digitally displayed in high precision units of 0.1V; allowing you to check beforehand for signs of electricity trouble or the lowering of performance of your electronic devices. All wiring is done by simply inserting into the lighter socket. (It is also possible to directly connect to any of your electronic devices.) V capa is based on insertion into the cigarette lighter, but if necessary you can still attain superior results with direct connection as well. Engine Torque (Improvement in Ignition) Improvement in Audio Quality *Fuse Power Cables and some other products are sold separately. *The main unit itself is not waterproof, so please only use with interior fuses. Specs ·Compatible Car Models=DC12V vehicles ·Display=8.5-18V ·Main Unit Size=20x60x50mm Voltage Meter with built in Stabilizer V capa VMC ¥8,700