Japan Antenna CRB22U Desktop Booster; Compact size, easy to use and install; Strengthen UHF radio waves. The newly adopted power lamp makes it easy to check the operation. Environmentally friendly RoHS compliant; Specifications: Reception channel/frequency: UHF: 13dB - 52ch; Gain: UHF: 17dB - 22dB; Appropriate input level: 45dB - 71dB; Rated output: UHF 93 (9 waves) dB; Power consumption: 1.3W; Dimensions (H x W x D): 41mm x W x D): 109 mm; Weight: 10.32 mm;