This type of PFD/Life jacket needs to be serviced annually by Australian law which cost around $30~40.
Great buy @ $49.99
Australian Standard AS 4758.1. Level 150 PFD. Neoprene collar for comfortable fit. Includes whistle and oral inflating tube. Includes 33g CO2 gas cylinder for inflation. Before inflation. After inflation. Sold deflated
Pretty cheap for an inflatable adult.