Multiple preset frequency groups and IR sync for interference-free operation. Effective working distance of ≥60 meters and battery life of ≥7 hours for extended use. Delivers high-fidelity sound with UHF wireless technology, ensuring stable and clear audio transmission. Adopts 48KHz sampling rate and companding to minimize noise in the wireless transmission. Dual-channel technology separates stereo channels for a true surround sound experience, enhancing audio quality. This advanced audio system operates within a frequency range of 470MHz to 960MHz, providing exceptional audio quality with a dynamic range of 92dB and a signal-to-noise ratio of 105dB. The system is designed to function effectively in a wide temperature range of -10℃ to +50℃, making it suitable for various environments. With a frequency stability of 0.005% and a total harmonic distortion of ≤0.8% at 1KHz, it ensures reliable performance for professional audio applications. Color: As Shown Material: Plastic+Metal Package Contents: 1*Receiver 1*Transmitter 1*Earphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.