AKG WMS-40 MINI Vocal / Instrument Set Dual - double wireless vocal and instrument set US45A/US45C frequencies: 660.700MHz, 662.300MHz Included: SR40 Mini Dual receiver PT40 MINI bodypack transmitter hand transmitter HT40 Charger AKG SR40 Mini Dual Receiver: Frequency response: 40Hz - 20kHz THD: 0.8% Signal to Noise Ratio: 110dB Audio output: 2 balanced, 1/4" jack Dimensions: 133x43x132mm Weight: 581g AKG PT-40 Mini Bodypack: Frequency response: 40Hz - 20kHz THD: 0.8% Signal to Noise Ratio: 110dB Power: 10mW 3-position switch: On/Mute/Off Power: 1 AA battery Working time: up to 30 hours with a 2200 mAh battery Dimensions: 60x75x30mm Weight: 60g AKG HT-40 Mini Handheld Microphone: Frequency response: 40Hz - 20kHz THD: 0.8% Signal to Noise Ratio: 110dB Power: 10mW 3-position switch: On/Mute/Off Power: 1 AA battery Working time: up to 30 hours with a 2200 mAh battery Dimensions: 230 x 52.5mm Weight: 195g