Cool products from China

[Larz60+]

I don't know how good your Chinese is, mine is basically non-existent, so
I was relying on google translate for the description. With a bit more research,
found that this is being offered by adafruit (at a reasonable markup to $44.95)
but they have done the due-diligence (I hope) to get  the specifications correctly
translated: url: https://www.adafruit.com/product/2390
This is version 1.1, I didn't get the version of the one you found from the translation,
but expect it to be even more recent based on the capabilities.

• STM32F405RG microcontroller
  
• 168 MHz Cortex M4 CPU with hardware floating point
  
• 1024KiB flash ROM and 192KiB RAM
  
• Micro USB connector for power and serial communication
  
• Micro SD card slot, supporting standard and high capacity SD cards
  
• 3-axis accelerometer (MMA7660)
  
• Real time clock with optional battery backup
  
• 24 GPIO on left and right edges and 5 GPIO on bottom row, plus LED and switch GPIO available on bottom row
  
• 3x 12-bit analog to digital converters, available on 16 pins, 4 with analog ground shielding
  
• 2x 12-bit digital to analog (DAC) converters, available on pins X5 and X6
  
• 4 LEDs (red, green, yellow and blue)
  
• 1 reset and 1 user switch
  
• On-board 3.3V LDO voltage regulator, capable of supplying up to 300mA, input voltage range 3.6V to 10V
  
• DFU bootloader in ROM for easy upgrading of firmware
  

Version 1.1 adds:

• High-speed crystal changed from 8MHz to 12MHz
  
• LDO changed from MCP1802 to MCP1703
  
• USB VBUS power diode replaced with silicon diode
  
• JST battery connector pads added with protection FET
  
  A video is available here: http://youtu.be/5LbgyDmRu9s
  
  They don't mention SMS messages which are only sent over cellular networks,
  the page you pointed to does, and also mentions telephone function, as well as
  a barometer, and GPRS for packet radio (possible mode for transmitting the GPS output
  and amateur radio applications).
  
  I spent a lot of my career working with embedded systems going back as far as the old
  s-100 bus cards (like Intel 8080, Rockwell 6502, etc.), so even though I am retired, i
  still get excited when something new comes on the market.
  
  You could take your idea even further. Since it has a photosensitive buzzer circuit (which
  might be used to trigger other functions beside buzzer, like triggering a timer for example).
  
  Looks like a fun board. If you want help with your apps and can use an old dude, let
  me know!