Feature: 1. ADVANCED TECHNOLOGY: Professional wireless calling system adopts high performance wireless technology, stable, applicable to a variety of places, paging effect is obvious. 2. FASHIONABLE AND PORTABLE DESIGN: Professional wireless calling system adopts fashionable design, easy to carry, novel appearance and easy to move, no place to call. 3. TIME DISPLAY: The display receiver shows the time of the year, month and day, accurate and convenient, easy to record the call time, improve work efficiency. 4. WIDELY USED SCENARIOS: Professional caregiver call buttons are suitable for a variety of application scenarios, suitable for families, hotels, bars, restaurants, factories and other places. 5. SUPERIOR PERFORMANCE: Wireless calling system with full function guarantee, IPX4 waterproof grade, high sensitivity receiver, and lasting. Specification: Item Type: Wireless Calling System Material: ABS SU 620 Display Receiver Parameter: Operating Frequency: 433.92MHz Size: Approx. 210x140x30mm / 8.27x5.51x1.18in Receiving Sensitivity: 105dB Decoding:Learning Code Waterproof Rating: IPX4 Operating Temperature: -20℃~ 60℃ Pager Button Transmitter Parameter: Operating Frequency 433.92MHz Battery Type: Lithium Battery Battery Model: CR2032 x2PCS Single Transmitter Battery Capacity: 240mah (Included) Transmit Current: 10mA±3mA Standby Current: Approx. 200m/656.2ft Keystroke:1 Million Times Waterproof Rating: IPX4 Operating Temperature: -20℃~ 60℃ Dual Key: (CALL)(CANCEL) . Package List: 30 x Call Bell Buttons 30 x Stickers 1 x User Manual 1 x Display Receiver 1 x Power Adapter Note: Manual measurement please allow some error.