The low cost 'Kimafun' 2.4gHz wireless microphone is perfect to use with most audio equipment. It has everything needed to connect and set up a wireless microphone in seconds. The black lightweight head worn headset microphone with 2.4gHz transmitter is unique to the receiver. Each set has its unique coded transmitter/receiver and only works with the headset supplied. Possible to use with as many others at the same time without interference. Receiver has 3.5mm stereo jack plug output and locking 6.35mm screw on adapter. Perfect for use with PC/Laptops, Video cameras, Sound recorders, PA loudspeaker systems, Mixer/mixing desks and most other types of audio/video equipment. Both units have built in 3.7v / 500mAh Lithium battery that lasts 6 hours taking only 1 hour to recharge. Includes micro USB charge lead to connect both units to a single 5v USB phone charger or PC port. Maximum range indoors is 10 metres and 30 metres clear line of sight outdoors. The uni-directional cardioid anti-feedback microphone is 20mm in diameter with foam windshield and only 10mm without. The lightweight headset transmitter is comfortable when worn with on/off switch and adjustable sensitivity. Its unique coding and digital 2.4gHz transmitter produce perfectly clear sound all the time without interference or loss of signal