Feature 120 Channels - A 20 channels base and 20 pieces of pagers help avoid the waiting of the client in the long queue to a great extent. 220 Charging Slots - Pager can be placed in the base to charge when it's free. 31km Connection Distance - A built-in antenna enables pager to work normally within 1km from the base. 43 Indication Modes - Adopting 3 indication modes of vibration, bee cue, and vibration plus bee cue to make it suitable for different situations. 5-107dBm High Sensitivity - High sensitivity enables base to call pagers clearly and correctly.Features: 1. 20 Channels - A 20 channels base and 20 pieces of pagers help avoid the waiting of the client in the long queue to a great extent. 2. 20 Charging Slots - Pager can be placed in the base to charge when it's free. 3. 1km Connection Distance - A built-in antenna enables pager to work normally within 1km from the base. 4. 3 Indication Modes - Adopting 3 indication modes of vibration, bee cue, and vibration plus bee cue to make it suitable for different situations. 5. -107dBm High Sensitivity - High sensitivity enables base to call pagers clearly and correctly. 6. Wide Compatibility - Suitable for places where there are many guests waiting for service. Specification: Product type: Wireless Queue Calling System Channel: 20 channels Indication mode: Vibration, bee cue, vibration plus bee cue Receiver: Working voltage: DC3.7V (rechargeable battery) Charging voltage: DC5V Working frequency: 433.92MHZ Standby current: 1010mA Working current: 7510mA (vibration) Receive sensitivity: -1072dBm Battery capacity: 200mAh Decoder: Learning Code (AM) Size: about 49*101*11mm/1.93*3.98*0.43in 20-way Keyboard Host: Working voltage: DC5V/3A power adapter Working frequency: 433.92MHz Standby current: 245mA Transmit current: 10030mA Encoder: Learning Code (AM) Size: about 150*300*33mm/5.91*11.81*1.3in Package List: 1 * 20 Channels Main Engine 20 * Receivers 1 * Antenna 1 * Power Adapter .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }