Motorola DTR410 Digital On-Site Two-Way Radio
http://www.amazon.com/gp/product/B000BJ5S20?tag=sukses2015-20
Allows other DTR radios on same group ID and channel to communicate
Gives extra-long battery life - up to 145 hours of operation per full charge
Meets military 810 C D E and F specifications for shock vibration water dust and temperature extremes
Uses contrast adjustment and backlight timer and provides battery gauge
Stores recent call list - up to last 20 transmissions
900 MHz ISM license-free band with a 1 watt transmitter capable of coverage of up to 300000 sq ft or 25 floors