Fitbit Versa 2 | $128 | Amazon
This smartwatch from Fitbit is 29% off for Prime Day, where it can measure your sleep and fitness throughout the day. It also has Alexa built-in, so you can command any lights or music that are connected, to be switched on as soon as you speak into the Versa 2. It comes with small and large bands so you can make sure that the Versa 2 fits your wrist, while also feeling comfortable.