Finding the right leg shaker is essential for those looking to enhance blood circulation, especially if you value quiet operation. Given these preferences, I have shortlisted the top four leg shakers that fit these criteria exceptionally well. These products are designed to improve blood flow, are electrically operated for ease of use, and maintain a quiet profile, making them suitable for both office and home settings.

1. Revitive Circulation Booster: This top choice combines advanced EMS (Electrical Muscle Stimulation) technology with a sleek design. It's known for its effectiveness in improving blood circulation and comes with an adjustable intensity feature. Its quiet operation makes it ideal for use under a desk without disturbing your work environment.

2. Vibration Plate Exercise Machine by LifePro: A versatile device that serves multiple purposes, including enhancing blood flow. Its quiet motor allows for discreet usage in a workplace setting. The machine also offers various intensity levels and additional wellness benefits beyond just leg shaking.

3. Circulation Maxx Reviver: This product is designed to stimulate and massage the feet and legs quietly and effectively. It's easy to use and recommended by many healthcare professionals. Its portable design adds to its convenience for both home and office use.

4. MedMassager Therapeutic Massager: Though slightly more intense, this device delivers on its promise of improving circulation and offers a quiet operation as well. It’s suitable for those who need stronger stimulation and prefer higher intensity settings for better results.

These carefully selected products stand out for their effectiveness, quiet operation, and additional useful features. Whether you’re at home or in the office, one of these leg shakers should meet your needs beautifully.