Features: Brand new and high quality 18 hours Long-term endurances. Low power chip.Accompany you to record for long-time. 20m Connecting distance. Long distance recording.The signal isstable and constantly connection. Intelligent noise reduction. Accurately filter all kinds of noise. Professional 2.4G chip. Nano-core, no lag, low latency, long-term battery life. Truly restore human-voice. High degree of reduction without noise. Specifications: Material:ABS Color:Black/Yellow Transmission protocol: 2.4G Transmission distance: 20m Sound delay: ≤25ms Microphone: -38dB+3dB omnidirectional Charging box battery: 300mah Endurance: 18 hours Signal to noise ratio: ≥60dB Sampling rate: 44.1KHz Operating current: ≤12mA Power off: ≤20UA Input: DC4.5-5.2V. Adapter: 5V1A Frequency response: 20Hz-20kHz. Working temperature:-10°C-50°C Package Includes: 1x Wireless Lavalier Microphone note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.