This great for dead leg, heavy leg, tingling numbness weakness or stiffness. Because it's portable and rechargeable with USB. I put it in my handbag and take it everywhere!! You can get them cheaper than this too. There's loads on Amazon, this is just one.... https://www.amazon.co.uk/AERLANG-Percussion-Handheld-Massager-Recovery/dp/B08H133S2L/ref=sr_1_4_sspa?crid=2BF91JPK4WT7X&keywords=massage%2Bgun&qid=1694249833&sprefix=massage%2Bgun%2Caps%2C83&sr=8-4-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1