1. Working voltage: DC3.5V-5.5V2. Current: 75mA (MAX)3. Charging time: 4 hours4. Use time: about 8 hours5. Carrier frequency: 600-900Mhz6. RF power: 10dBm7. Transmission distance: 80m (open and unobstructed)8. Receiving sensitivity: -88dBm9. Sampling frequency: 48KS/s10. Signal-to-noise ratio: 65dB (f=1kHz, P=1Pa A curve) Input voltage: DC-5V11. Ergonomic design, high-sensitivity pickup head12. The sound effect is clear and loud, comfortable to wear13. Easy to disassemble, the headset can be used as a handheld microphone after disassembly14. Anti-fool pointing, 90-degree anti-fool microphone is more humanized design15. Long-distance receiver, strong anti-interference, stable signal, 50-80 meters receiving range16. Built-in 600mAh lithium battery, long battery life17. Support 15 groups of frequency points, multi-group use without cross-frequency18. Compatible with MIC interface devices, plug and play, equipped with 6.35mm and 3.5mm adapters19. Metal hose, free to bend, easy to adjust the direction in real time20. Dimensions: 68x28x23.3mmSpecification: Package Weight One Package Weight 0.15kgs / 0.34lb One Package Size 9cm * 5cm * 11cm / 3.54inch * 1.97inch * 4.33inch Qty per Carton 194 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 194 pcs = 34338 pcs40HQ: 412 cartons * 194 pcs = 79928 pcs