... operateAutomatic impedance matching and protection Ø Receiver Signal input modeØ Builtin clamp input,Internal receiving loop,1k Mini Sensor,8k Mini ... LCDInternal batteryØ Lithium cell battery, 14.8V,7AhBatter chargerØ Input AC100~240V,50/60HzØ Output DC 8.4V,2A/3ADime.Ø 700mm* ... 14.8V,7AhExternal sourceCar power voltage 12V,DCBatter chargerInput AC100~240V,50/60HzOutput DC 16.8V,2A/3ADime.275mm*220mm* ...