Specification:
Type: Queue Wireless Calling System
Material: ABS
Colour: White
Frequency: 433MHz
Waterproof: Yes
Voltage: DC 3.7V (Lithium battery)
Decoding Method: Learning Decoding
Receiving Sensitivity: -1072dBm
Charging Voltage: DC 5V
Number of Receivers: 16 (expandable)
Notification Method: Buzzer sound and flashing LED light

Package Included:
1 x Keypad Transmitter
16 x Pagers (This product only includes 16 Pagers. If you need more Pagers, please contact us.)
1 x Power Adaptor
1 x English Manual

Note:
Please allow slight 1-2cm difference due to manual measurement and a little color variation for different display settings.