Product DetailsProduct SpecificationsProduct Details Overview W Audio SDPROTX 3-Channel Silent Disco Transmitter A UHF transmitter for use with the W Audio SDPRO silent disco headphones. There is no limit for the number of headphones receiving from each transmitter, up to three transmitters maybe used if each transmitter is switched to a different channel allowing up to three audio sources to be played back to the audience. The RF transmission system operates on 863-865Mhz in the license free CH70 spectrum. Features – 3-channel silent disco transmitter – System: UHF / RF – Modulation: FM – Mode: Stereo – RF frequency: 863-865Mhz – Range: Up to 200 metres in ‘low power’ mode, 400 metres in ‘high power’ mode – Power supply: 12Vdc 1A (included)   See what our customers have to say on Trustpilot: Outstanding service and so helpful I purchased a set of DDJ-800’s and DM-40 speakers. The customer service was outstanding, the response time to any of my emails with questions were answered in 30 minutes or less and the overall experience was 10/10! I had a small issue with a cable, which was due to pioneers own fault but Ian at Techformusic solved it almost instantly and I couldn’t be more thankful! I would recommend them for anyone looking to purchase any music equipment. Product Specifications Specifications – Transmitter dimensions (H x W x D): 35 x 185 x 140mm – Transmitter weight: 0.29kg – Dimensions in case (H x W x D): 55 x 260 x 190mm – Weight: 0.62kg