Housed in tough composite case, this unit is designed to prevent damaging voltage spikes and surges reaching delicate vehicle electronics. Clips across the battery terminals and permits processes such as welding and plasma cutting to be carried out without the danger of damaging the vehicles onboard electronics. Fitting recommended before any routine workshop maintenance. Shows green light when operating correctly and red light for fault. Fitted with heavy-duty, fully insulated battery clips. Features & Benefits:Fits across battery to protect against voltage surges.Ideal when welding, cutting and jump starting.Protects coded radios, alarms, ECUs, fuel tank senders plus much more.Fitted with heavy-duty, fully insulated battery clips.Model No. PROSAF/12 Specifications: Model No PROSAF/12 Brand: Sealey Nett Weight: 0.45kg System Voltage: 12V