Datasheet

By doing that, you can use 1Sheeld+ as input or output
from Arduino and make use of all of the sensors and peripherals
already available on your smartphone instead of buying the actual
shields. You can use it to control an RC car using the phone's
gyroscope, or even tweet when someone enters the room!
The objective of this product is to provide faster and cheaper ways of
prototyping your Arduino projects.
1Sheeld have already developed a variety of virtual shields for
1Sheeld+ like LED, Toggle Button, Buzzer, Slider, LCD, 7-Segment,
Keypad, Music Player, Game Pad, Notifications, Twitter, Facebook,
Foursquare, Gyroscope, SMS, Flashlight and Mic. There are currently
more than 40 shields available in 1Sheeld+.
 Uses Bluetooth LE with range up to 30 feet
 Running on an Atmel ATMega162 @ 7.37 MHz
 Communicates with Arduino using UART
 Communication baud rate 115,200 b/s
Product Dimensions: 57.0mm x 55.0mm x 19.0mm / 2.2" x 2.2" x 0.7"
Product Weight: 19.0g / 0.7oz