▷ There is an LCD screen, which can display the current volume, power, charging status and channel information, etc.; ▷ Use ISM2.4G free frequency band, GFSK digital modulation/demodulation technology; ▷ Automatically search the transmission frequency when starting up, no manual frequency binding operation is required. Using digital encrypted transmission technology, unique algorithm of random pairing mode, so that each microphone is only connected to the paired power amplifier, avoiding interference with other classrooms, up to 180 independent frequency bands, 1000 classrooms can be used at the same time; ▷ Power on and automatically enter the pairing state, pairing connection time: ≤3 seconds. After the pairing is successful, it will automatically enter the receiving state; when the wireless microphone host leaves, it will automatically enter the pairing state, and the state switching is all automatic, without manual frequency pairing operation; ▷ With PPT page turning and one-key black screen/recovery functions, it can be used with a projector or computer for demonstration and explanation; ▷ The transmitter has built-in laser pointer and wireless keyboard, the laser pointer can be used as an electronic pointer, laser distance: ≥100 meters, laser wavelength: 650NM CLASSII; custom wireless keyboard, allowing users to customize functions according to their needs; ▷ Adopt the highest standard of digital wireless audio transmission, achieving a sound transmission delay time of less than 0.5ms; ▷ Ultra-small size (free with back clip, easy to wear), length 11CM, width 3CM, thickness 1.2CM; light weight, easy to hold; ▷ The transmitter of this type of product is universal and has the function of volume gain adjustment; ▷ The transmitter can be used and worn in a variety of ways (chest-mounted, waist-mounted, handheld, etc.), can use the built-in pickup head to speak, and can also be connected to an external headset microphone or lavalier microphone with a 90° right-angle 3.5mm plug ; ▷ The transmitter is powered by a lithium battery, and the charging and data communication are realized through the Micro-USB 2.0 cable, and the upgrade management operation is easy to use; ▷ Low energy consumption design, automatic mute or sleep when weak signal or no signal, energy saving and environmental protection.