The MZ-3 is slightly bigger; 

• Rechargeable 

• Water resistant 

• Uses only ECG sensor

• Bluetooth 4.0

• Zone display only on phone

• 16 hours of recorded memory without your phone

Has up to 6 months of battery life and only comes with one band (Chest strap).

Accuracy: 99.4% 

Retail price: $149.99 https://buy.myzone.org/

My price FOR YOU: $90 Click HERE! 

The MZ Switch is smaller;

• Rechargeable

• Waterproof 

• Uses ECG and PPG sensors

• Bluetooth 5.0 (4x range & 8x data transfer speed)

• Zone display on device

• 36 hours of recorded memory without your phone

• Additional strap colors

Has up to 6 months of battery life and comes with 3 wearable bands depending on type of workout (Forearm, wrist and chest).

Accuracy: 99.4% with chest strap(ECG) 

Accuracy: 95% with other bands. (PPG)

Retail price: $159.99 https://buy.myzone.org/

My price FOR YOU: $100 Click HERE!