1. UAV , Sound Fidelity Technology, Let You Convey 2. Stable Sound Quality, Long-Distance Sound Amplification, Anti-Whistle Design, No Magnetic Interference 3. 1200-Meter Ultra-Long-Distance Transmission, Using 400-480MHZ Wireless Frequency Band, Penetrating Powerful Built-In Voice Decoding Chip, High Fidelity, Does Not Affect Flight 4. Long-Distance Communication Sound Transmission, High-Power Speakers, Up To 115 Decibels, Fully Applicable In Scenarios 5. ABS Wear-Resistant Material, Made Of Exquisite ABS , No Secondary Synthetic Plastics, Light And Polished, Can Avoid Affecting The Aircraft'S Battery Life Product Size: 13.5x10.2x3.8cm (), 15.5x5x2cm (Remote Control) Battery Specification: 3.7V 600mAh (), 3.7V 800mAh (Remote Control) Charging Time: About 50 Minutes (); About 90 Minutes (Remote Control) Transmission Distance: About 1.2 Kilometers Colour:grey Material:ABS+plastic Package Contents: 1 x 1 x Amplifier 2 x Nylon Sticker 1 x USB Cable 1 x Chinese And English Manual 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.