Feature 11000 Meters Working Distance: Pager system external antenna, open area working distance is about 1000 meters (3280 feet). 2999 Different Codes: The Pager system sends 999 different codes by a combination of numbers 09. 3ABS Material: Restaurant pager is made of high quality sturdy ABS material, which is wear resistant and durable, and can be used for a long time. 4Scope of Application: Wireless calling system is suitable for replacement of SU668 SU669 SU680 SU668S SU669S food fetcher numeric keypad transmitter. 5Applicable Scenarios: Wireless calling system application places restaurants, tea houses, banks, coffee shops, milk tea shops, factories, hospitals, service halls and other calling and queuing places.Item Type:PagerSystemMaterial: ABSFrequency: 433MHzStandby Current: 60mA 10mATransmission Current: 100 mAVoltage: 100-240V .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xPagerSystem1 x Power Adapter