high quality Box Content: 1 x UHF wireless receiver, 2 x UHF bodypack, 2 x Lavalier mics, 2 x Headset mics, 1 x Power adapter, 1 x 1/4 audio cable, 2 x Lithium battery, 2 x Spare battery rack, 1 x User manual.Rechargeable Lithium Battery: With up to 8 hours of battery life, these mics will keep up with your longest events or late-night jam sessions without missing a beat.Powerful Transmittion Range - 264ft in diameter and stable transmission over this wide range, it is not only perfect for indoor use, but also suitable for gigs, karaoke events, dj, and other outdoor shows.Stable Transmission Performance: With its high-quality cardioid capsule and improved circuitry design, each handheld microphone captures and transmits sound smoothly, ensuring there are no dropouts, hiss, or feedback. This results in robust, clean, and stable sound quality.2x10 Adjustable Frequency: Each microphone has 10 adjustable frequencies and supports the simultaneous use of 10 sets of microphones.