Ditto
Tech specs 
Size22 x 37 x 10mm
MaterialPlastic
ChargingNo
BatteryReplaceable coin-cell battery
Battery lifeUp to 6 months
Water-resistanceFully water-resistant
Weight8 grams
Sensor
Display
Screen size
ColorsBlack, White, Clear
Other
Activity tracking 
Steps
Distance
Calories
Activity
Floors
Sleep
Heart rate
Vo2Max
Stress & recovery
UV exposure
Skin temperature
Galvanic skin response
GPS
Running features
Swimming features
Smartphone notificationsIncoming calls, texts, emails, & calendar updates.
Other - Silent alarm that wakes you and not your partner.
- Ditto has a virtual tether that reminds you whenever you've forgotten your phone.
Links 
View onAmazon
Amazon US rating3.5 out of 5 stars
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