Welcome to our shop! Specification: Condition: 100% Brand New Operating Voltage: 0.7V - 9V Frequency Adjustment Range: 88-108MHZ Transmission Distance: When using the 70 cm antenna conductors and working at 9V, the local firing range can reach 50-100 meters. The actual distance may vary depending on the environment. Main Color: Green (As The Picture Shows) The relationship between working voltage (volts), supply current (mA), and transmit power (dBm) is as follows: - 9V, 24mA, 10.2dBm (approximately 11 mW) - 8V, 21mA, 9.5dBm - 7V, 19mA, 8.5dBm - 6V, 17mA, 7.1dBm - 5V, 14mA, 6.1dBm (approximately 5 mW) - 4V, 12mA, 4.5dBm - 3V, 9mA, 2.2dBm - 2V, 6mA, -1dBm (approximately 1 milliwatt) - 1.5V, 4.2mA, -4dBm (approximately 0.5 mW, suitable for average family environment with minimal radiation) - 1V, 2.4mA, -9dBm - 0.7V, 0.9mA, -20dBm (that is 0.01 mW) Package Includes: 1 x 0.7-9V 88MHZ-108MHZ FM Transmitter Module Board Attention: Please note that there may be slight inaccuracies in size due to different product batches or hand measurement. The color may also appear slightly different due to monitor settings. Please consider the real product as the standard. Thank you for your understanding! 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.