Features: Wireless lavalier microphone, live recording 1-to-1/1-to-2 computer camera microphone, with a receiver. 360 degree full directional sensitive sound collection with quickly response. Build in chip, intelligent noise cancellation, clear sound quality. Build in large capacity battery for long time endurances. Large LED display screen, real-time display of various types. Specifications: Material: ABS Type: 1 to 1, 1 to 2(optional) Size: approx. 4.7x4.3x1.3cm/1.85x1.69x0.51inch Product Name: Lavalier Wireless Microphone 2.4G Solution: AD6976M4 Working frequency: 2.4G-2.4835GHz Work format: GFSK Battery: 300mAh Talk time: over 10 hours Receiver operating power consumption: 16ma Receiver charging current for mobile phone: 1000mA Frequency response: 20Hz-20KHz Charging time: 1.5-2 hours Charging (input standard): DC5V Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1Pc or 2Pcs Wireless Lavalier Microphone with 1Pc Receiver (optional)