Wu loo Wireless Intercom Doorbell Quick Start Guide i (Speaker ~ CALL anchor & Scummed CY (Mic 0 i» TALK button i + 0 (press & hold to TALK), i (LED Windcheater OE (Charge stand [ 7 Outdoor Machine Indoor Machine © volume Outdoor Machine -Adjust the volume of the voice from the Indoor machine; Indoor Machine -Adjust the ring volume and the volume of the incoming voice from the outdoor machine.