Working frequency: 2.4GHz 2 groups of frequencies with 8 channels to choose from, easily avoiding interference frequencies: CH1 2414/2490MHz, CH2 2432/2510MHz, CH3 2450/2390MHz and CH4 2468/2370MHz Modulation mode: Broadband FM 1. Transmitter Module: Model: TX6733 Unit: piece Power: 2W Working voltage: 5V Current consumption: 600-800mA Dimensions: 45mm x 28mm x 10mm/1.8 x 1.1 x 0.4Inch Communication distance: 2000-3000 meters in open space 2. Receiver Module: Model: RX6788 Unit: Piece Working sensitivity: -93dBm Working voltage: 5V Current consumption: about 150mA Dimensions: 45mm x 30mm x 4.8mm/1.8 x 1.2 x 0.2Inch Built-in frequency phase-locked loop with high stability Low clutter leakage. Directly output audio and video signals Patch installation makes it convenient to use. Due to different product batches, the appearance , which does not affect the use. Colour:As Shown Material:PC+Metal Package Contents: 1 x Transmitter module 1 x Receiver module 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.