1986 Matchbox Burnin' Keys Cars Porsche 959. This example of the Matchbox Burnin' Key Cars is in excellent condition. The original key is present and the button press shoots the car at speed as designed. The key does have a sound capability but the batteries are flat so untested. The battery cover is also missing. 
Having the key present seems to be a rarity based on others advertised, so this is the chance to own a working one.