Built-in dual antennas 80M long-distance transmission, using 2.4GHz wireless transmission technology, stable signal transmission, high-definition audio transmission. Large-capacity battery and long-lasting. Using a 18650 lithium battery with a capacity of 900MAH and replaceable USB data cable for power supply. It can be used for 6-8 hours when fully . 48KHZ sampling rate, high-fidelity reproduction of timbre, high-performance decoding chip, dynamic range signal-to-noise ratio 110DB, accurate restoration of sound details. L-shaped connector, L-shaped connector, compact and space-saving, more convenient to use. Smart compatible multi-device connections,Easy and convenient to use, enjoy the fun of wireless transmission. Type:B:One for two Colour:Black Material:Metal Package Contents: 2 * Microphone Transmitter Receiver 1 * Microphone Receiver 3 * Adapter 1 * USB Cable 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.