... 3. Show 2-digit number 4. It can work with 99 1-key in max5. It can ... K-L for elevator1. Wall Installed, waterproof 2. Work with our receiver to combined the wireless calling system3. ... will be shown on the receiver ,so other work can easy to know who is calling.Technical ... each table3. Signal repeater (optional), enhance the signalHow does the system works?1. After your customer gets seated ...