2.4G Wireless AV Sender 500m transmission range 6 Selectable channels Function and Features:1. Use 2.4GHz ISM frequency band.2. 500m transmission ... select these channels to avoid interference from signals of a wireless router, etc.4. Compatible with DVD, DVR, CCD ... /NTSC system and stereo audio transmission.7. Dimensions: 10cm (L) ×8.5cm (W) ×3.0cm (H). 2.4G wireless audio & video transmitter, Model ...