I can tell you what zapper I do not recommend The Ultimate Zapper Ken Presners product.I received his zapper recently.The zapper looks like it is made of cheap plastic.The ac adapter looks like it came from the dollar store.I put the zapper back in the box and emailed Mr Presner for R.M.A (return merchandise authorization)number and return instructions.I sent him a number of email with no response.PayPal contacted him and he still hasn't responded.Paypal advised me to contact my credit card company.So much for his advertised 100% satisfaction gaurantee and 3 month trial.