1Pcs Wrist Watch Receiver Smart Call System Button 10Pcs Calling Pager Features: Wrist Receiver: 1. This product has vibration, ring, sleep and alarm function. 2. With 3.7V polymer lithium battery, the normal standby time is about 20 days. 3. Built-in antenna, it can receive the caller signal separately, without the need of base station service. 4. The unit can display a set of four digits or letters and store 10 numbers. Press the M to scroll through the page and press the Enter to confirm the call and delete. 5. There are two ways to remind you of ringing and vibrating: customers can choose different prompting methods according to actual needs, ringing and vibration can be switched at will, it is simple and convenient 6. It can connect 500 calling extensions, any calling extension can set letters and numbers combination 7. 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.   Pager: 1. Simple structure and it is easy to install 2. Modern design, it is extraordinary and refined 3. External antenna, it has long transmission distance 4. Waterproof design, the lamp hole is not exposed 5. Unique design on the back, you can fix it to the wall, easy to disassemble with tools 6. The inventive design of the coding chip, the code is stable, and is not affected by moisture and other factors.   Specification: Condition: CTW05 Wrist Receiver: Model: CTW05 Uses: Cafes, tea houses, Internet cafes and other service personnel receive the receiving end of customer calls Transmission 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 caller Size: Approx. 50 * 15 * 40mm / 2 * 0.6 * 1.6in(without strap)        273 * 22mm / 10.7 * 0.9in(including body length) Frequency Point: 433.92MHZ; 315MHZ Power Supply: Adapted to 5V=1A charger, built-in 3.7V polymer lithium battery Color: Black Material: ABS Engineering Plastic   CTT09E Pager:  Model: CTT09E (without handle) Use: cafes, tea houses, Internet cafes call the service personnel's launcher Transmission 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 host of the communication   Size: Approx. 85 * 85 * 18mm / 3.3 * 3.3 * 0.7in   Frequency point: 433.92MHZ; 315MHZ Color: White   Package List: 1 * Wrist Receiver 10 * Pager 1 * Cable