easy opeartion,just press the button on the table, the waiter will get signal soon. prompt service by service calling system

FeaturesWireless Call BellSend call signals without wiresCompatible with all main unitsWork with GDH100, GDH400, GDH500, GDH300Long Life of BatteryOne year 50 calls in a dayBenefitsEasy to be placed on the tableSomeone who needs to be serviced could press the button to get attendantMaintenance FreeEnhanced designed for durabilityAntenna exteriorSingle circuit designUsabilityMulti-colored cases.

SpecificationsPhysical Dimension  120x85x55(mm)Weight  210.5g (With battery, Stand)Control  Two call buttons (service and cancel)Output Power 20mWFrequency Band 315MHzModulations  ASK (AM)Transmission Range 500m free fieldBattery 9V 6F22 laminated cellBattery life  1 year (50 calls in a day)Operating RangTemperature Rang:-10 °C to 50 °C for 1 hourHumidity Range: 95% relativehumidity for 4 hours

service calling system for restaurant hospital