Features: With one-click noise reduction, plug & for play, very easy and convient to use. 230 ft (70M) stable wireless connection at open areas. Suitable for teaching, stage performers, Meeting etc. Wireless make you more freedom- to move around and demonstrate highlights or important facts-, perfect for Fitness- Instructor, Teacher, a dancing instructor. Built-in battery capacity: 1200mah - 2000mah(included), Battery life: more than 12 hours, charging half hour for 6 hours use. The cordless microphone will be automatically connected after the receiver is plugged. Specifications: Material: ABS+Metal Built-in battery capacity: 1200mah - 2000mah(included) Battery life: more than 12 hours Signal-to-noise ratio: equal or more than 60dB Frequency response range: 30HZ-15khz Package Includes: 1 Set Wireless Microphone note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.