Specifications:

• Working temperature: -20 Celsius to 55 Celsius
• RF frequency: 433MHz
• Power: 12V23A battery (included)
• Origin: CN(Origin)
• One key: Call
• Modulation mode: ASK (AM)
• Model Number: Call Button
• Has sticker: can be hung around the neck
• Emission distance: 80 meters (outside)
• Brand Name: retekess
• Certification: FCC
• Certification: CE