Feature: 1. RF Wireless Technology: Utilizes RF wireless technology for a stable system and extended wireless receiving range. 2. Display Receiver: Supports up to 400 pagers and is compatible with single-button or 4-button pagers. 3. Button Transmitter: Call button labels are customizable; buttons starting with letters A through F can be named. Supports single or list display mode. 4. Characteristics: design and portable. Equipped with 30-level digital volume control. Displays time, year, month, and date. 5. Uses: Features advanced microprocessing chip for stable performance. Widely used in hotels, bars, restaurants, and offices. Specification: Item Type: Restaurant Pager System Material: ABS Display Receiver Parameters: Operating Frequency: 433.92 MHz Working Current: <130mA Standby Current: <550mA Modulation Method: ASK Receive Sensitivity: Better than -105dB Decoding: Learning Code Waterproof Grade: IPX4 Working Temperature: -20°C to 60°C Button Transmitter Parameters: Operating Frequency: 433.92 MHz Battery: 2 x Built-in CR2016 Button Batteries (included) Battery Capacity: 80mAh Emission Current: 10mA ± 3mA Standby Current: <1μA Open Distance: >200 meters Keystrokes: 1 Million Times Waterproof Grade: IPX4 Working Temperature: -20°C to 55°C Buttons: Call, Checkout, Order, Cancel Package List: 1 x Display Receiver 20 x Button Transmitter 20 x Film 1 x User Manual 1 x Adapter