MULTI BUTTON AUDIO UNIT supplier, MULTI BUTTON AUDIO UNIT near me

Detail:

• Slave panel
• DR-4US/6US/8US/10US/12US
• 4/6/8/10/12 buttons
• Material: Aluminum
• LED light
• House call and talk
• DC 12V

• Power source DC 12V
• Data Transmission 3 wire in common +1