| performance parameter | Packaging parameters |
| Sensitivity: 39dB ± 1dB Audio response: 720-820MHz Frequency response: 20HZ-23kHZ Charging voltage: DC5V 300MA Distortion:<0.5% @ 400Hz Effective distance: 50 Charging time: about 3 hours Usage time: about 5-10 hours Product usage: Automatic connection when turned on, multiple devices can be used simultaneously without frequency interference, the headset is detachable, and can be used for both handheld and head mounted purposes. It is specifically designed for teaching purposes. Sound reinforcement and amplifier equipment (amplifiers/turntables/various audio/amplifier devices, etc.) No noise/no whistling/good sound quality/long-distance/detachable/handheld shouting. | Packing quantity: 100 sets Box weight: 13.5kg Color box size: 160 * 120 * 50MM Outer box size: 62.5 * 52.5 * 34cm |
