Used until October 2024. No operational issues. System Specifications Operating Frequency Band 2.4GHz ISM band Audio Dynamic Range 109dB Total Harmonic Distortion 0.05% or less Communication Distance 30m (line of sight, without interference) Operating Temperature Range 0℃ to 40℃ Audio Frequency Response 20 to 20,000Hz Audio Sampling 24bit/48kHz Receiver : ATW-R1100J Receiving Method Automatic channel selection Maximum Audio Output Level 0dBV (XLR3-pin male, balanced), -6dBV (φ6.3mm mono jack, unbalanced) Power Supply DC12V (using the included AC adapter, Japan domestic use only) External Dimensions (excluding protrusions) Approx. H46.2 x W190 x D128.5mm Weight Approx. 290g 2-Piece Type Transmitter : ATW-T1001J Transmission Output 10mW Power Supply DC3V (2 x AA alkaline batteries, or 2 x AA Ni-MH rechargeable batteries (1900mAh or more)) Operating Time Approx. 6 hours *Operating time varies depending on the type of batteries used and the ambient temperature during use. External Dimensions (excluding protrusions) Approx. H107 x W70.2 x D24.9mm Weight (excluding batteries) Approx. 100g