The specifications for the Universal Wheelchair System are as follows:

Power Input

Input Voltage: Supplied by One (1) 9V battery

Battery Life: 1 Month

Box Dimensions

Length:4.25”

Height: 2.375”

Width: 1.375”

Weight

Approximately 1.2 pounds

Standards Considered

IEEE 802.15.1

IEEE 1528a-2005

FCC 15.209 – Signal Strength Limits

FCC 15.247

FCC 15.249

Operating Conditions

Product has been tested at room temperature with no adverse conditions.  The plastic box surrounding the Arduino should be able to repel small amounts of water, but it is not completely waterproof so exposure to water or prolonged exposure to humidity could cause device to fail.

Device Frequency

2.4 GHz

Arduino Uno R2 Specifications

Microcontroller: ATmega328

Operating Voltage: 5V

Input Voltage: 7-12 V

Input Voltage limits: 6-20V

Digital I/O Pins: 14 

Analog Input Pins: 6

DC Current per I/O pin: 40 mA

DC Current for 3.3V pin: 50 mA

Flash Memory: 32 kB

SRAM: 2 kB

EEPROM: 1 kB

Clock Speed: 16 MHz

Arduino Specifications gathered from: http://arduino.cc/en/Main/arduinoBoardUno