https://www.youtube.com/watch?v=p4SmU_9_s-c

RM130 a peace, can keep for 5years.

i suggest you go AceHardware and get one of those compress air type, because you can used it as a defense weapon as well.
you can grab it and discharge on any intruder and basically used a frying pan to finish the job. AceHardware selling at RM40 only.