Frequency: 2.4GHz Input voltage: DC4.8-5.4V Charging port :for Lightning/for Type-C/for3.5mm Battery capacity: 70mAh Transmission Distance: 120 m barrier free Microphone size: 47.1*15.04*15.61mm Microphone weight: 8.2 g Receiver size: 47.5*13.47*7.95mm Receiver weight: 4.4g 3-IN-1,Suit for smartphone/laptop/computer/camera and other devices. The recording process is more precise,so that the effect is quatitatively improved. 2.4G transmission frequency: -low latency, fully expanded audio channel, stable transmission. Built-in silicon mic, clear voice-pickup, filter noise. High-performance microphone stable connection,up to 120 meters receiving distance. Package included: 1 x Rechargeable Microphone 1 x Receiver 1 x Monitor headphones 1 x English Manual 1 x USB cable The speaker supports U disk and TF card.Dual speaker stereo sound.