Feature 1Transmitter and Receiver: This patient pager system comes with 1 transmitter and 1 receiver, ideal for elderly, seniors, patients, disabled. 2Easy to Use: This wireless calling system can be easily applied, just plug the receiver into an electrical outlet. 3Adjustable Volume: This pager call system provides 31 types of ringtones and 4 adjustable volume levels, meeting the needs of users. 4LED Light: This caregiver pager supports LED flashing light. Adopts IPX4 waterproof and up to 875 yards effective distance in open area. 5Wide Application: This wireless call button with advanced chip is perfect for home, villa, patient, pregnant women, hospital, health club, and office.Item Type: Patient Pager SystemMaterial: ABSReceiver Parameter:Operating Frequency: 433.92MHzReception Sensitivity: Minus 1072dBmDecoding: Study CodeWaterproof Class: IPX4Operating Temperature: Minus 20 to 60Button Transmitter Parameter:Operating Frequency: 433.92MHzBattery Type: Alkaline BatteryBattery Model: 12V23ABattery Capacity: 60mAh (Battery Included)Transmitting Current: 10mA3mAStandby Current: <1uAOpen Distance: >800 Meters / 875ydKeys Life: 1,000,000 TimesWaterproof Class: IPX4Operating Temperature: Minus 20 to 55Single Key: Call .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 x Transmitter1 x Receiver1 x User Manual