1、Receiver Pager Kit: Wireless calling system kit, including a wireless watch receiver and 10 pieces button pagers, the receiver can connect up to 500 pagers, efficient and practical. 2、Built in Battery: The watch receiver has a built in 250mAh lithium battery, with a standby time of 7 days, and a single call pager has a 240mAh battery, ensuring longer endurance. 3、Prompt Methods: Equipped with vibration, buzzing, and flashing prompt methods, with 33 built in call commands that can be freely set to adapt to different application scenarios. 4、Convenient Use: The wireless watch receiver adopts a LCD screen display, which is clear and intuitive, equipped with user friendly menu operation, improving work efficiency. 5、Call Record Saving: Call records can be permanently saved, even if the power is cut off or the factory is restored, the call records will not be lost, widely used in restaurant, tea house, etc. Item Type: Wireless Calling System Watch Receiver Parameters: Connection Pager Quantity: 500 Pieces Prompt Method: Vibration, Buzzer, Flashing Receiving Sensitivity: -110dBm Call Record Capacity: 20 Sets Battery Type: Lithium Battery Battery Capacity: 250mAh (included) Standby Time: 7 Days Call Button Parameters: Work Frequency: 433.92MHz Battery Type: CR2032 Lithium Manganese Battery Single Pager Battery Capacity: 240mAh (included) Transmission Current: 10mA±3mA Standby Current: <1uA Open Distance: >200 meter / 656.2ft Button Lifespan: 1000000 Times Waterproof Grade: IPX4 Working Temperature: -20-55℃ One Key: Call 1 x Receiver Watch 10 x Button Pagers 1 x Charger 1 x Charging Cable 1 x User Manual