Wireless Restaurant Pager System Touch Panel Wireless Calling System beeper for Coffee Shop Restaurant Guest Queue Pager System Notice: The charger for this product is a EU plug, Some countries and regions may need to purchase suitable plug adapters themselves. Pager can ring, vibrate and flash. The distance between transmitter and pager is almost 500 meters in open area. Frequency: 433MHz Power: Input: AC 110-240V, 50/60Hz;Output: DC 12V/2A Pager battery: Built-in 3.7V I 200mAh rechargeable lithium battery One transmitter can be equipped with up to 998 Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage:AC100-240V Color: Black Material: plastic Package Contents: 1 * Host 20 * Receiverrs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.