See this item in amazon Japan
Price = ¥ 25,380
ASIN = B003M8E6FW
forms of communication: Line 6 digital voice communication
frequency response: 10 Hz-20 kHz and dynamic range: 118 dB
RF carrier frequency: 2.4 GHz / compatible channels: 6
communication range line of sight at 30 m (may depend on local conditions and)
(United States Federal Communications COMMISSION) approval: Part 15 approval, no license required
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