Frequency range: 2.400GHZ-2.4835GHz Sensitivity: -35dB Battery: 450mAh Power supply mode: built-in lithium battery 5V Use time: 15 hours Use distance: 30 meters Transmitter size: 80mm Transmitter weight: 30 grams Microphone direction: one-way Connection method: 2.4G technology Wide range of compatibility: amplifiers, buses, speakers, mixers/sound cards, home theaters, sound bars Automatic pairing and connection when booting up without frequency pairing High-sensitivity condenser sound head, with noise reduction sponge, clear sound Long-lasting and , the battery can be recharged Small and portable, easy to use [30M long distance reception] [Multiple sets are used at same time without frequency channeling] Color: Black Material: plastic Package Contents: 1 * Transmitter 1 * Microphone 1 * Data cable 1 * 3.5mm adapter Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.