Yesido KR19 2 in 1 Magnetic Button Lavalier Microphone 1. Material: ABS+TPU 2. Wireless transmission: 2.4GHZ 3. Sampling frequency: 48KHz 4. Sampling depth: 24bit 5. Sound delay: 22ms 6. Charging current: DC 5V1A 7. Charging time: 1.5 hours for microphone, 2.4 hours for charging case 8. Microphone battery capacity: 70mAh 9. Charging case battery capacity: 600mAh 10. Working life: about 6 hours for single microphone use24 hours for charging case 11. One-to-two, two microphones can receive sound at the same time 12. Magnetic button design, mini and portable, no-feel wear 13. CD-level sound quality, equipped with noise reduction and reverberation function 14. 100-meter long-distance sound pickup, 360-degree omnidirectional microphone