Motorola Business CLS1110 5-Mile 1-Channel UHF Two-Way Radio
http://www.amazon.com/gp/product/B0000AUFKI?tag=sukses2015-20
Ideal for businesses that are labor-intensive or have high employee turnover
Operates on 56 business-exclusive frequencies and features 121 codes for added security
Rechargeable lithium ion battery provides up to 12 hours of continuous use
Transmits up to 200000 square feet or up to 15 floors in a multi-level building
Key pad lock prevents accidental changes to the settings