RF data module with transmission distance up to 500 meters,Carrier frequency 433 ... hardware, awaken from COM port, awaken from air6) Main APP: wireless meter-reading, order dishes system, queue system, corporeitytest equipment, electrical ... : DC 2.7V-3.6V or 3.6V-5.5V, RS232/RS485: DC 4.5-5.5Vl) Saving power model: awaken ... )n) Dimensions: 44 x 27 x 8mm (antenna not included) Wireless RF module