This is a cache that is a little flash light and should be a P&G, please hold on to the string that is attached to cache while you are retriveing It. If you dont hold on to the string the cache might fall and get stuck. the log is in the battery compartment! When you put it back please but it securely and leave the string sticking out a bit. Have fun!
UPDATE: string has been removed and it has been wired.