Ideal for doctors, nurses and healthcare professionals. Unique and handy design fits around the bell of stethoscope (not included). Squeeze buttons on sides to activate examination light. Sturdy plastic construction. Please note: Does NOT fit the following models: Adult UltraScope®, Littmann® Master Cardiology®, Littmann® Master Classic® or Littmann® Double Lumen®. Stethoscope not included. Two CR1220 Battery included (replaceable). Hands free option available, call for details.