TW68 Smart Bracelet Measures Blood Pressure and Heart Rate for $22 and Up
Some people may need to frequently measure their blood pressure because of their health condition, but it’s often a cumbersome experience, so they may get lazy, and not do it as often as needed. TW68 smart bracelet should make this easy, as it’s your typical fitness tracker with an heart rate monitor, but adding the capability to also measure blood pressure. It’s also very cheap, and I first found it on DealExtreme where it sells for just $24.
- MCU – Nordic Semi NRF51822 ARM Cortex M0 micro-controller with 2.4 GHz radio
- Data Storage – 7 days detailed data, 23 days total data
- Connectivity – Bluetooth 4.0 LE
- Display – 0.49″ OLED display
- Sensors – PixArt-PAH8001EI blood pressure sensor; 6-axis Invensense-MPU6500 accelerometer and gyroscope
- Function Health tracker: Blood pressure measurement, Heart rate monitor, Pedometer, Sleep tracker
- Other functions: Call/Message notification, Fall reminder, Social sharing, Time, Alarm clock
- Misc – Vibrator, touch button
- Battery – 60 mAh LiPo battery good for 7 to 15 days; charge time: around 1h30; magnetic charging
- Dimensions – Watch face: 41.1 x 18.5 x 11.9mm; silicon strap: 240 x 20.8 x 11.9mm
- Weight – 25 grams
- IP Rating – IP65 (waterproof while washing hands)
The smartband is sold with its custom USB charging cable, and a user’s manual. The provided app is compatible with Android 4.4+ and iOS 7.1+ smartphones. I’ve been told that the blood pressure data is not shown directly on the watch, so you’ll need to initiate and read the measurement with your Android smartphone or iPhone, which is not as convenient as it could be.
This all still looks pretty good, but based on my disappointing experiences with optical heart rate monitors on most Chinese smartwatches and trackers, except possibly with Energympro EP-SH09 (not perfect but usable), I have serious doubts about the heart rate monitor accuracy, let alone the blood pressure claims. If you look at the product description on DX, the manufacturer claims the measurements are very close to professional equipments… But the embedded Pixart “blood pressure sensor” is actually an heart rate monitor, and the sensor manufacturer only claims heart rate capabilities, nothing about blood pressure.
Finally, if you look at the upcoming and FDA approved Omron BP6000 professional blood pressure watch it is designed with a small motor that will gently squeeze your wrist while taking measurements, something that TW68 won’t do. So it’s most likely a toy than anything else. The demo from Tinydeal below shows the accessories and some of the capabilities of the bracelet, except of course HRM and BP…