The moisture meter can quickly measure the moisture content of the grain. 1. Plug and Play: This product does not require a cumbersome matching and joining process. Open the microphone and insert it into your phone to start recording; It is simple to use and has a wireless design, making it better suited for recording live class meetings online. 2. Intelligent Noise Cancellation: It is equipped with windproof sponge to avoid spraying; Built-in intelligent noise cancellation system has strong anti-interference properties and can effectively filter the surrounding noise; The maximum reception range is 25M, which can be used outdoors normally. 3. Low latency: This microphone comes with a highly sensitive capacitive connector that provides faster response and more detailed reception, capturing every detail of the sound. 4. Long battery life: The product is equipped with high capacity lithium battery, and both receiver and microphone can have a capacity of 500mAh; It can be used up to 15 hours and can be used with micro charging interface to power the product at any time. 5. Subject: The product is compatible with most products on the market with 3.5mm/0.14in and 6.35mm/0.25in interfaces, such as cameras, computers, mobile phones, sound cards, amplifiers and so on. Specification: Item Type: Headset with Microphone Weight: 138,00 g/4,87 oz Product Material: ABS, Aluminum Alloy Receiver battery type: Lithium-ion battery (supplied with built-in battery) Receiver battery capacity: 500 mAh Microphone Battery Type: Lithium-Ion Battery (Supplied with Built-in Battery) Microphone battery capacity: 500 mAh Power Consumption: ≤ 35 mAh Transmission Frequency: 2400 Hz Reception frequency: 2400 Hz Microphone charging time: about 4 hours Usage time: about 15 hours Charging interface: Micro USB Frequency Response Range: 20Hz to 20KHz Signal-to-noise ratio: ≥ 75dB Applicable equipment: equipment with 3,5mm interface, audio equipment with 6,35mm interface List of packages: 1 x Transmitter 1 x Receiver 1 x Conversion Head 1 x Charging Line 1 x Sponge 1 x Headgear Clip Note: Supplied with built-in battery. 1. Insert the 3,5 m/0,14 inch plug on the receiving side of the product into the 3,5 m/0,14 inch socket of the device. Once the connection is successfully established, the indicator light will remain on. 2. Press and hold the on button for 3 seconds and the indicator will flash. When paired with the receiving end, the indicator light will remain on, indicating that the pairing connection has succeeded. 3. Increase and decrease the volume by briefly pressing the power button on the microphone.