Last longer during sex with this 10ml (0.34oz) sized Rhino Long Power Spray For Men by Hot Production. Rhino is an age old Chinese formula that has been helping men to delay ejaculation. It has been used for centuries with great success in China. It can be a valuable and effective remedy for premature ejaculation, but even men who just want to last a little longer will gain enjoyment. Just apply the spray to the head and shaft of the penis 5-10 minutes before intercourse for the best results.