DETAILSSystem Features: UHF Band Microphone System Operation Range: Up to 160'+ ft. LED Digital Display Readout Screens Simple Setup & Hassle-Free Operation AF & RF Audio Transmission Signal Strength Indicators Independent & Adjustable Channel Volume Controls Selectable Frequency Range: Up to (8) Channels 1/4" Audio Output Jack What’s in the Box: (2) AA battery (1) 18650 Rechargeable Battery. 3.7V / 3500mAh. Power Cable Lavalier Mic Headset Mic Beltpack Transmitter Receiver Base Transmitter Specs: RF Output: >10 dBm Modulation Type: FM Max Deviation: ± 40 KHz Spurious Emission: > 55 dBc Nominal Current Drain: < 40mA Battery Powered, Requires (2) x 'AA' Batteries -Each Receiver Specs: Battery Type: Universal 18650 Rechargeable Battery, 3.7V, 3500mAh Signal / Noise Ratio: -105dB Border Upon Channel Rejection: >70dB T.H.D.: < 1% Audio Output Level: 0-300 mV Dimensions 6.8 x 5.3 x 1.7 in Power Supply: 110/220V (12-15V Power Adapter) What's In The BoxWhat’s in the Box: (2) AA battery (1) 18650 Rechargeable Battery. 3.7V / 3500mAh. Power Cable Lavalier Mic Headset Mic Beltpack Transmitter Receiver Base MANUALS & DOWNLOADS PDWMU112 - Manuals