The small and cute design key chain is a voice recorder rather than a simple decoration key chain. Also it is a bottle opener. You can either pre-load voice message to do brand promotion or record your own voice as a memo as popular recorder. 10 seconds to 60 seconds are acceptable. When you try to open a bottle with it, you will hear the sound. Interesting and creative, not only because the funtion, but also the jersey shape. You can custom the color and logo to promote your brand. The sound helps the promotion too when people use it.