Products from the USA may come with an input voltage of 110V–120V, requiring a step-down transformer. Check the device wattage to select the correct power converter.
•HLK-RM04 Wifi Module : This item can be Compatible with RS485, not means the item is with RS485.
•Support Built-in Onboard Antenna and External Antenna.
•Serial to Wifi, Serial to Ethernet, Ethernet to Wifi
•Support Dhcp to Automatically Obtain Ip, Support the Device to Assign Ip When the Module Works in Ap Mode.
•Packing List: 1* Hlk-rmo4 Module, 1* Hlk-rmo4 Test Board, 1* 2.4g Antenna, 1* 5v Power Supply
