1. Compatible with set-top box and other A/V sources, more reliable to use. 2. Designed with adjustable audio/video output level, and optional output channel. 3. Simple appearance design, exquisite workmanship. 4. Made of high-quality material, sturdy and durable for long-term use. Item Type: Modulator Rated Voltage: USB 5V Rated Power: 1W Rated Frequency: 50Hz Remote Frequency: 38KHz/56KHz Remote Distance: 10m Default Factory Settings: Channel 21 (471.25MHz), PAL/I/38KHz Power Consumption: USB 5V 400mA Operating Temperature: 0 - +40°C Color: As Shown Material: Plastic Package Contents: 1 x Modulator 1 x USB Cable 1 x Signal Receiving Cable (Due to different product batches, the appearance may vary slightly, which does not affect usage) Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement error allowance is +/- 1-3 cm.