Peet, get the Attwood and remove the heavy metal plate on the bottome that's used to weigh it down, replace the 3Dcell battery pack with 5 subCcells. It'll scream at 6v instead of 4.5. It's not supertough but if you tie it down and don't every drop it (plastic case isn't durable), re-seal the on/off switch, don't let is sit in water for long it'll work