The product is suitable for securing of 1 Gbit / 1000 MBit Lan and DSL lines. Higher damping could not be found.
+ Workmanship is fine, durable and stable due to the metal housing
+ Discharge capacity of 10kA = 10.000 A
+ Surge Protection
- Settled no short network cable, must be purchased separately
Conclusion: In my opinion, quite useful and convenient way to protect the DSL connection or network.
But: a lightning strike to the building or in the immediate vicinity of holds as soon nothing on! Even this I think quite good not product!