• 1 with high strength ABS plastic shell ,durable in use
• 2 Use digital code technology and the function is steady and reliable
• 3 Show 3-digit number and also can show ABCDHLPU,easy to distinguish the service area.from 001-999,A01-U99.
• 4 It can work with 1000pcs 1-key or multi-kesy call buttons in max
• 5 It can show differetn service type.fixed, slow flash, flash
• 6 It can save 5 calling info in turn,and apply in basic service places.
• 7 Calling Alert: sounds or music