 and here's a king detector here with so you make a metal detector yes so how many do you sell every month they sell how many how many years you sell many yes a lot seven containers one month several containers thousand ten thousand ten K ten K ten K every month so this one is how much about seven to ten about ten US dollar then US dollar how long is the battery life two years two years you mean the long it's gonna last the battery battery yeah 22 hours 22 hours and charge how do you charge it charger no charges this change the battery inside just changing the battery okay and you have another one with charger no how long is this last also 24 hours all right about 24 hours and you have some bigger one how much is this price 10 and so 10 US dollar and so you can you can find for $10 you can find the find the treasure hunt for treasure you have all these different ones here what is the best one you have what is this one has special function what is what is on the screen here go have metal on my foot