I had a reliable alarm on my Sym Symphony scooter. Although it did not have a shock sensor, the only downside was that it quickly drained the motorcycle's battery, and in six years, I had to replace three batteries

If not the best among the best. In the purple cable, you connect an external shockproof device that you place on the chassis and it's amazing. It works perfectly on any vehicle I have installed it on and it's excellent. Waterproof device, small with a powerful siren. 1000% satisfied. Find someone to install it correctly.

The alarm is worth its money! It may not have a shock sensor (which, when sensitive, can detect someone tampering with it), but it will go off with every car that passes by on the road (I've experienced it and I imagine we've all seen someone speeding by and setting off alarms). So, in the end, only the tilt meter makes sense and the perimeter sensor that some more expensive ones have. Quality-wise, I've had it on 2 cars and 3-4 friends have had it for 16 years without any damage or issues (yes, it's the same for so many years, which is both good and bad). It has the cuts, it has settings if you want it to arm automatically, immobilizer, etc. It's not Chinese and it doesn't cost 300 euros, it's somewhere in the middle. Oh, be careful with the installation and don't listen to those who say it cuts the engine, the fuel pump will burn, etc. They simply don't know...

It does not have a shock sensor but only a tilt sensor, resulting in being able to remove everything from your engine and it not hitting... generally it does not easily hit nor can you adjust its sensitivity. Prefer an alarm with perimeter, shock, and if possible, with remote notification.