Features OBVB prevents the lightning rod ahead of time, uses the stainless steel material, corresponds the different extent of protection, each kind of model has the different performance characteristic separately. Merit: 1. Non-electric minor, life long 2. After the thunderstroke the anti-radar quality cannot change 3. Different protection radius choice 4. The complete driving type directs the thunder system 5. When has the lightning, only then can have activates 6. Outlook artistic 7. Safe reliable 9. Does not need to maintain