Solu 433Mhz RF transmitter and receiver kit Module for Raspberry Arduino ARM MCU//433M receiver module 433MHZ Superregeneration Wireless Transmitter Module Burglar Alarm// 433MHz Wireless Transmitter Module + Receiver Module Alarm Transmitter Receiver About us (Solu ), Professional factory of circuit boards, welcome to our store for more choices with best price. What we pursue is your satisfication of our service, not just for our goods.For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. we will reply you about any question you ask within 24 hours Usually, you will get it actually in 9~19 days, If you are in the USA and the item is NOT Fulfilled by Amazon. the item will be sent to you by USPS with shipping information from China. The estimated delivery time offered by Amazon is not the real time. Your patience is highly appreciated. Hope you will receive your item soon and enjoy using it. Receiver module: Receiving frequency 433.92MHZ; Receiver sensitivity:-105DB transmitter head:Launch distance :20-200 meters (different voltage, different results) ;Operating voltage 3.5-12V transmitter head: Transfer rate 4KB / S ;Transmitting frequency 433M.Receiver module: Operating voltage DC5V; Quiescent Current 4MA