DEBRA EST-12 Portable Stereo Wireless Monitor System Transmitter & Receiver 1. UFH signal transmission with 20 switchable channels to prevent signal interference. 2. Low signal latency, stable and reliable, with an effective range of up to 80 meters. 3. Built-in rechargeable lithium battery, provides 5-6 hours of continuous use. 4. Mini monitoring system, practical and portable. 5. Equipped with comfortable headphones, it isolates noise and provides clear vocals. 6. Switchable stereomono mode to suit different needs. Technical Parameters Frequency Range: 560-590MHz Number of Channels: 20 Frequency Stability: 0.005% Effective Operating Distance: 80 meters Audio Compression and Expansion: DSP Digital Audio Sampling Rate: 24-bit 48kHz Frequency Response: 60Hz-20kHz Dynamic Range: 95dB Signal-to-Noise Ratio: 120dB Total Harmonic Distortion: <=0.8% at 1kHz Package Included: Transmitter x 1 Receiver x 1 Type-C cable x 1 Earphones x 1 3.5mm audio cable x 1 User manual x 1 Storage bag x 1 Tripod x 1