PowerDot 2.0 Smart Electric Muscle Stimulator The PowerDot 2.0 Smart Electric Muscle Stimulator ($199) is one of the best devices for recovery and performance. The portable EMS machine stimulates specific muscle groups via Bluetooth. Simply download the app and pair the device with Bluetooth to your phone or tablet and let it work its magic. Image Source: amazon.com PowerDot 2.0 Smart Electric Muscle Stimulator $199 from amazon.com Buy Now