Features: brand new and high quality The receiver for smartphone,camera,computer. Wireless lapel microphones can be used for course teaching,recording,live streaming,conference,vocal,vlog,, etc. Operating range is up to 164 feet and the signal transfer more stable. The transmitter and receiver have built-in rechargeable batteries. The small size and lightweight design can easily carry. Specifications: Operating Range: About 164 feet (50 meters accessibility) Material:ABS Color:Black Working Voltage:3.3-5V Sensitivity:-382dB Signal Shielding: 90dB Frequency Range:2.4-2.483GHz Working Current:Max 100mAh Using Time:About 5Hours Charging Current:400mAh Charging Time:About 2Hours Dynamic Range: 90dB Note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Transmitter; 1x Receiver; 1x USB Charging Cable; 2 x 3.5mm Audio Cable; 1 x Microphone; 1x User Manual;