Intelligent noise reduction: Automatic noise reduction, clear sound amplification. High-power speaker with a volume of up to 120 decibels. Working at heights makes it more convenient to patrol and speak. Small and light: With its compact size, the weighs only 66g, even toy aircraft can carry the product. Long battery life: Built-in large-capacity lithium battery, fully in 2 hours, can work continuously for 4 hours. Ultra long distance transmission: The communication distance is up to 2KM, making high-altitude sound amplification easier. communication: Not limited by the communication of the aircraft, built-in polymer lithium battery, 10 hours standby.<br><br>Item Name:Mini Wireless Communication Distance: 2-3km Impedance: 2Ω Power: 5W Frequency: 433MHz Built-in Battery: 4.2V Lipo Battery Charging Voltage: DC 5V Charging Time: 2h The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:plastic<br><br>Package Contents: 1 * Walkie Talkie Speaker Kit<br><br>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.