ABS flame retardant material, insulated, flame retardant and high temperature resistant. Simply connect it to the battery (red clip to positive terminal, black clip to negative terminal) to monitor the status of the battery. Summer model: lower the charging voltage to prevent the battery from being overcharged; winter model: the charger automatically raises the charging voltage to fully charge the battery. Car battery charger with backlit LCD screen, clear and conspicuous LCD display, showing the state of charge and battery status. Plug in the battery and plug it in again (choose the correct mode), it will automatically charge, intelligent charging, complete automatic stop, so you can use with confidence. Repair all applicable 12V lead-acid, marine and deep cycle automotive batteries for use in including AGM, GEL, SLA, flooded cars, trucks, SUVs, motorcycles, lawn mowers, boats, etc