Feature: 1. RELIABLE TRANSMISSION: Wireless calling system use high performance wireless technology, stable and reliable, suitable for a variety of places, long wireless distance 2. BEAUTIFUL AND PORTABLE: Restaurant wireless calling system has a fashionable and novel design, beautiful appearance, easy for you to carry and move 3. ACCURATE DISPLAY: Wireless paging buzzer calling system can display time, month and date, accurate and convenient for memory, useful and practical 4. HIGH CAPACITY: The wireless buzzer calling system support up to 400 callers for large scale use, which is widely used in the service area with strong re use ability 5. APPLICABLE SCENARIO: Queue wireless calling system adopt advanced microprocessing chip, widely used in restaurants, hotels, offices and other places Specification: Item Type: Wireless Calling System Model SU-620 Display Receiver Parameter Description: Operating Frequency: 433.92MHz Size Specification: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18in Material: ABS Receiving Sensitivity: -105dB Decoding: Learn code Waterproof Rating: IPX4 Operating Temperature: -20℃~ 60℃ Model SU-1K Button Transmitter Parameter Description: Operating Frequency: 433.92MHz Material: ABS Battery Type: Alkaline battery Battery Model: 12V 23A Battery Capacity: 60mAh Transmitting Current: 10mA±3mA Standby Current: <1uA Open Distance: >200 meters Keystrokes: 1 Million times Waterproof Rating: IPX4 Operating Temperature: -20℃ ~ 60℃ Single Key: CALL. Package List: 10 x Table Bells 10 x Adhesive Stickers 1 x Power Adapter 1 x Receiver 1 x User Manual