Features:1. This unit can display a group of four digits or letters and store 10 numbers. Press the M key to scroll through the page and press the Enter key to confirm the call and delete.2. With ringtones and vibration two tips: customers can choose different prompts according to actual needs, ringtones and vibrations can be switched at will, simple and convenient.3. Can take 500 call extensions, any call extension can set letters and numbers combination, any bit can be set to 0 ~ 9 ten numbers and letters ABCDEFGHIJLMNOPQRSTUWY and (-).4. Each call can be set to 2 digits, 3 digits or 4 digits display, such as 01, ABC, or A-08.5. With an alarm clock function.6. With sleep function: This product has a sleep function. When the customer does not need to receive a call, he can choose to enter the sleep state. In the sleep state, the clock and alarm functions still work, and almost no power is consumed.7. Adopt 3.7V polymer lithium battery, the normal standby time is about 20 days.8. The pager signal can be received separately without the need for base station service. Built-in antenna.9. Use SAW DEVICE aeronautical communication special parts to ensure the stability of signal transmission.10. World-class coding, no garbled phenomenon.11. Fully waterproof structure, resistant to temperature and humidity changes, safe, stable, and highly reliable.12. Stylish and beautiful, simple and generous, the silicone button design is flexible, lightweight, waterproof and good hand feel.Specification:Watch Receiver:Product model: CTW05Function: Cafes, tea houses, Internet cafes and other service personnel receive the receiving end of customer callsTransmission distance: The theoretical distance of the open area is 1500 meters. The actual distance is 100-150 meters indoors according to the test.Compatibility: Compatible with any callerSize: about 50*15*40mm/1.97*0.59*1.57inch (without strap), about 273*22mm/10.75*0.87inch (including body length)Frequency point: 433.92MHZ; 315MHZPower: adapt 5V = 1A charger built-in 3.7V polymer lithium batteryColor: BlackMaterial: ABS engineering plasticCTT23 Pager:Size: about 60*60*20mm/2.36*2.36*0.79inchFrequency: 433MHzWorking current: 17mABattery: 12 V / 23A batteryLaunch distance: 500m (open area)Package List:1 * Watch Receiver10 * Pager1 * Data Line1 * Plug