SIIG's long-term business vision, comprehensive product line, effective marketing strategy and exceptional customer support have made SIIG the leading brand for computer add-on products. High-quality control standards are evident by one of the lowest defective return rates in the industry. PRODUCT FEATURES: Wirelessly transmit audio using FM frequencies; Auto-scan mode: digital auto-scan feature automatically selects the best FM channel for transmitting audio signals; Manual setting mode: allows you to select FM channels for transmitting audio signals manually; Powered by one AA battery (Alkaline or rechargeable NiMH) or DC power via the included USB power cable; Illuminated LCD display panel.