Wireless transmitter and receiver Weighing transmitter is divided into two parts, the transmitter power supply with 4.5V DC power supply (optional accessory transmitter battery, the battery can provide power to the sensor, can work for 6 days, with fast power when finished you can use rechargeable 4.5V DC power supply 3 hours, rechargeable power supply must not exceed 4.5V, otherwise the battery will overcharge damage.) receiver power supply 10-12V DC Power Supply, 0-5V output signal, determined according to the environment from receiving, open area of up to 500-900 meters, the building is generally 50 meters can be used in a variety of adverse situations, such as the presence of toxic gases and the human body by the power of real-time detection limit values ​​and other occasions, security items, building control, the value of high-altitude testing, and so force.