Debra EST-12 UHF Stereo Wireless In-Ear Monitor System Dual-Channel Portable Rec

Transmit power: 10mW;. Modulation mode: GFSK;. Total number of channels: 20. Audio output: 1 stereo headphone output. Stereo input interface: Ф3.5mm. System Technical. built-in battery Yes. inbox adaptor Yes.

eBay