Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Product Name: VHF or UHF Radio Modem RS485 RS232 USB Wireless Transceiver 20DBM 433M 868M Transmitter and Receiver Reminder: One cannot be used alone, please buy 2 or more. This series can be combinations: USB and RS485 wait Description: Working voltage: 4.8V-9V(2A Power Supply is Recommended) Interface: RS485 Frequency: 433MHz or 868MHz Transmit power: -40-and20dBm Receiver sensitivity: -114dBm Operating temperature: -25-and75 Transparent transmission mode rate : 1200 2400, 4800, 9600(Default), 19200, 38400, 57600, 115200 Open ground Transmission distance : 500M Weight(without antenna): 50g Material: plastic colour: As shown Package Contents: 1 x 433M Wireless Transceiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store