Wireless Presentation Conference:
Receiver: K8
Microphone: 2T2NH

Receiver features:
1. Operates in the UHF 640–690 MHz frequency band, employs a phase-locked loop frequency stabilization system, and offers 200 selectable channels.
2. Automatic frequency‑hopping function: Align the transmitter’s infrared pairing window with the receiver’s infrared pairing window, and the infrared signal will automatically search for the corresponding frequency channel.
3. Frequency-locking function: Press and hold the search button; the display will show the frequency-lock icon. To unlock, press and hold the button again.
4. Independent volume control.
5. Two independent XLR balanced outputs.
6. A 6.35 mm hybrid output jack.
7. The receiver’s LCD display clearly shows signal strength, audio dynamics, operating frequency, and more at a glance.
8. Effective range: 80 meters.
9. 12V DC power adapter.
10. Dimensions (chassis): 435 x 155 x 45 mm (length x width x height)

Transmitter:
The desktop speech microphone features a dignified and aesthetically pleasing overall design, incorporating two custom‑designed dual‑diaphragm lateral array microphones with gold‑plated condenser capsules. The microphone employs a lateral array configuration that precisely controls the horizontal pickup pattern, effectively minimizing environmental interference and acoustic feedback. A meticulously engineered etched mesh grille, combined with advanced interference‑correction technology, captures every sonic nuance with exceptional clarity. A uniquely shaped capsule chamber, paired with sophisticated pickup‑alignment algorithms, faithfully reproduces even the subtlest audio details. Specially designed shielding circuitry and an integrally molded zinc‑alloy housing efficiently suppress electromagnetic interference, ensuring pristine, clean sound capture to meet the demanding requirements of high‑quality conference amplification. The microphone’s form exudes a strong sense of unity, its design drawing inspiration from the traditional Chinese concept of “heaven round, earth square,” highlighting the essence of Chinese cultural heritage and conveying profound symbolic meaning.

Detailed specifications
Product Features
● Dual‑diaphragm horizontal array technology precisely controls the horizontal beamwidth, preventing acoustic feedback and eliminating howling.
● An etched mesh with precisely calculated hole diameters and spacing, combined with interference‑correction technology, enables precise control of every sonic detail, effectively enhancing the sensitivity of vocal‑range pickup.
● A unique cavity design, combined with pickup‑calibration technology, captures every sonic detail with remarkable fidelity.
● One-piece zinc alloy housing, effectively suppresses various types of electromagnetic interference.
● ZH9 surface treatment, resistant to interference and static electricity.
● Circular probe conduction design, vibration-resistant
● Design of an Inverter-Driven Purification Amplifier Circuit
● Integrated design of the microphone and base

Technical indicators
● Microphone capsule: dual 14-mm condenser lateral array microphone capsule;
● Polar pattern: Cardioid;
● Sensitivity: -30 dB (0 dB = 1 V/Pa, 1000 Hz);
● Frequency response: 20 Hz ~ 20,000 Hz;
● Output impedance: ≤200 ohms;
● Load impedance: ≥1000 ohms;
● Maximum sound pressure level: 137 dB SPL (0 dB SPL = 2 × 10⁻⁵ Pa);
● Equivalent Noise Level: 14 dB-A;
● Power supply requirements: 48V phantom power;
● Output connector: 3-pin XLR;