@GB For dropshipping, wholesale, please contact customer service. Product features: 1. Wireless collar microphone, mini design, easy to wear 2. Stable signal, clear reception, easy recording of high-quality audio 3. Get rid of constraints and connect 20 meters without obstacles Specification: Name: Wireless Lavalier Microphone Frequency range: 2.4GHz Frequency response range: 20~20KH Transmission delay: 18MS Signal to noise ratio: 64dB Input voltage: DC4.8~54V Charging current: approximately 65mA Battery capacity: 80mAH Working time: approximately 7 hours Charging time: about 50min MiTou: Digital microphone Applicable: Lightning interface is suitable for iPhone7/7/8 Plus, XR/XS/XS Max, 11/11 Pro/11 Pro Max, 12/12 Pro, iPhone 13/13Pro/iPad 2/3/4, iPad Air series devices. Type-c interface is compatible with iPad Air 4, mini6, iPad Pro 11/iPad Pro 12.9 and Android phones and tablets with OTG function.When using, please turn on the OTG function for better recording effect.