STIMULATOR Longer; more intense sex for him and her. Not only does this unique blend put you in the mood but it gives you extra energy to go all night long! Who needs a vibrator when you have got Stimulator! No batteries needed. Contains: 4 capsules which are 2 doses. Each capsule contains 53 mg L-Arginine; 53 mg L-Tyrosine; 80 mg N-Methylglicine and 106 mg Fosfatidylserine.