TinyDeal.com also has Xiaomi Miband Bluetooth Smart Bracelet (Black; Simplified Packaging) for $16.99 - $1.17 with coupon code simmibandsaving = $15.82. Shipping is free.
Note: This product requires Android 4.4 or higher for full functionality, or iOS 7 or higher for partial functionality.
Editor's Notes & Price Research
Did a search and didn't see this posted. Not sure how long the coupon code is valid. The battery life on these are really good. Lasted about 45 days on one charge for me.
Simplified Package $15.99 AC FS
Original Package $16.99 AC FS
Coupon Code: orimibandsaving
Mi Band, a fitness tracking wrist band that monitors your fitness and tracks your movement (walking or running) plus your sleeping pattern and use it as a smart vibrating alarm to wake up feeling better. Featuring the industry's most power-efficient bluetooth chip and accelerometer, a single charge on this waterproof device will last up to 30 days. Better yet, the band doubles as a security token that automatically unlocks your phone. The technical gubbins all live inside a small alloy body with LED notification lights. This alloy device can be slipped in and out of different colour rubber wrist straps to suit your style, and there were even some more smart concepts shown too including a leather option.
Extremely narrow 8mm Battery
Battery capacity: 41mAh
Input Current: 25mA
Input voltage: DC 5.0V
Metal surface material: Full magnesium - alloy
Body shell: Polycarbonate
ADI military force sensor
Dialog's leading Bluetooth chip
Wristband Material: Dow Corning TPSIV
Adjustable wrist strap length: 157mm to 205mm
Equipment requirements: it can connect with your Android 4.4/Bluetooth 4.0 mobile phone(support connect the system with Android 4.4 or more high)
* Record daily motion data: Xiaomi bracelet to help you record all-day event, calculate walking distance, and calorie consumption.
* Smart Vibration alarm clock, simulation wake up naturally Status: The user can set the alarm on the APP, in front of the preset alarm within 30 minutes, with a slight vibration to wake you from a shallow sleep, when to wake up slowly shallow sleep, naturally wake up closer.
* Automatic sleep monitoring.
* Bluetooth real-time synchronization to APP: analysis of movement sleep data, providing health advice.
* Reminder phone calls: phone calls, the bracelet can be within a certain range (in theory, should be a Bluetooth sensing range 10-15M) sensing phone calls, and in case you have not turned on within a certain time, the bracelet will vibrate and flash prompts you through. In the outdoor noisy environment, even if the phone placed inside the bag, still do not worry about missing important calls.
* Bracelet Binding identity, free password to unlock the phone: Forget about complicated unlock password, gestures, simply raised his hand to move to the next cell phone, "shua" is heard, immediately safe unlocked. Xiaomi account with your 1 on 1 binding, identify your identity, to better protect the safety of mobile phone information. Note: Equipment requirements: Xiaomi3/ Xiaomi4/ Xiaomi Redmi NOTE 4G with the system is Android4.4 and above MIUI or Android 5.0 above, and support for Bluetooth 4.0.
* Now it support for IOS, but it only work for Record daily motion data, Automatic sleep monitoring, Smart Vibration alarm clock, Find band, Reminder phone calls. Equipment requirements: Compatible with iOS 7 or above iPhone, iPad and iPod Touch etc. other equipment.
I bought this last time around, and it will NOT work with your Nexus 7 1st generation, even if you were to install cyanogenmod, which will activate the bluetooth 4.0 AND using android 4.4.4 +. This thing only works on PHONES. The app demands ALL permissions, which I absolutely felt uncomfortable with. I see no reason why this device shouldn't be designed so that it would at least work with an android device that is NOT a phone. It's collecting dust!!
--The Nexus 7 first gen has BLUETOOTH 3.0 (And no software will ever magically turn your BT 3.0 into BT 4.0). This will work with anything that meets the requirements, which in this case the Nexus 7 first gen does not.
"Warm Note: All orders, laid from April 14th, will be shipped on April 30th. You will enjoy $16.99 off during the time." - TinyDeal note on page for simplified package.
Order from TinyDeal app for $14.59 for simplified packaging, no code required.
Simplified packaging shipped from US to US 3-5 day shipping is $18.50
The Android app from official App store doesn't work (can't log in). I had to download new version from here on my laptop, and send it to my phone via dropbox.