Check the listing for details. SINGCALL Wireless Calling System Wireless Pager Calling System, Restaurant Pagin. Condition: New – Open box. Listed at 63.19 USD. SINGCALL Wireless Calling System Wireless Pager Calling System, Restaurant Paging Systems,Rechargeable Waterproof Watch Receiver APE6900 01. Waterproof. (It can be put into 3.3ft (1.0m) deep water, then it still can work for more than 30 minutes.)02. Has calendar, clock and alarm clock function. Rechargeable battery, super standby time (about 5 days).03. With fast delete function, it can delete one registered number or all registered numbers with only one key.04. Can download the registration information by charged software, makes the registration easier.05. With encryption function, avoiding the information lost by mistake operation. 06. OLED screen, thinner, lighter and more flexible anti-seismic and knock. Item dimensions L x W x H48 x 25 x 15 millimetersItem weight0.12 KilogramsBattery capacity150 Milliamp Hours Attention please, it can't be used alone!!This is a wireless wrist receiver only. Pager/Bell is not included.Purchase this item with some Transmitter Bells can build a simplest calling system.Pager: Go to SINGCALL storefront to find all one-button pager and multi-button pager .Search SINGCALL to find more.Where to install?Restaurant/Cafe/Fast Food Restaurant/Hotel/Golf Club/Bar/Night Club/Internet Cafe/Game Room/Karaoke/Hospital/Factory/Office/Anywhere needs attention of waiter.Have you ever been in a situation that you are ready to take your order in a restaurant but cannot find the waiter or waitress anywhere? The wireless attendant or server call paging system can solve your problem.Wireless fluid system is widely used in the service area. It includes the buttons for guests to use and the signal receiver for waiters to use. When the guest is in need, he or she just presses the button near him or her, his or her desk number will be displayed with vibration or beep.APE6900:Key number: 2 (FUN and ENT)Key life: Million timesNumber of display: 10 scrolling numbersScreen: OLED monochrome screenDisplay type: a group of three-digit or five-digit number (with storage function)Battery capacity: 150mAhVibration time: 1 to 15 secondsPager capacity: 500Prompt mode: Vibration onlyStandby time: 5 daysNumber deleting mode: manually, automaticallyCalling number display: all positions can be set with English letter or digit(0-9, A-Z)Screen Size:1.9*1.0*0.6 inches(48*25*15mm)Frequency:433.84Mhz