A stop limit order executes a limit order once the stop price is reached. Your stop limit order will become a limit order based on the limit price you have set.
Sample: Suppose that the current market price of BTC is PHP 1,500,000. Then, you placed a sell stop limit order for BTC with a stop price of PHP 1,400,000 and a limit price of PHP 1,300,000. If the price of BTC reaches PHP 1,400,000, a limit order with the limit price of PHP 1,300,000 will be placed.