Model: JD-999
Features:
● Wireless Audio Intercom
● Maximum supports 9999 units devices in a group
● DC 5V Power supply, build-in Li-battery 1200mA
● 433MHz working frequency
● One to multi broadcast intercom
● LCD displaying
● Supports 58 ringtones
● 800 meters transmission distance in open area
● 45 days standby time
● 5 hours charging time
● Used for office, hotel, hospital and restaurant