Specifications:With a palm-level size of 4 cm and a feather-level weight of 38 grams, you can go wherever you want to take it, just pick it up and set off immediately.FM40 is different from the vast majority of portable wireless microphones on the market, it innovates the dual antenna signal diversity technology of the first transmitter, when the antenna 1 signal is blocked, the device automatically activates the antenna 2 signal, always ensuring that the signal remains stable and does not flicker, so that creation is not restricted, the antenna is hidden in the open environment, the signal is strong and simple appearance, and the antenna is released online in complex scenes to ensure that the signal is not Environmental limitations.The FM40 has a built-in battery that is charged with a TYPE-C interface, and it has a comprehensive battery life of about 4 hours when fully charged, at the same time, it can be connected to an external mobile power supply for continuous power supply, allowing you to enjoy your creativity.It uses skin-like materials on the outer area of the screen panel, allowing you to get a comfortable touch at any time, the tight and powerful clip on the back makes the device easy to use, the built-in battery is in place in one second, and 80 meters of large signal reception scope can easily cope with various creative scenarios.Transmitter of the FM40 is a capacitive directional wireless microphone with a powerful lavalier clip, with a sensitivity of -33DB, in addition to its own microphone, the transmitter can also use a 3.5MM external audio source to extend the distance of the microphone, so as to fully take care of various complex use scenarios.Receiver of the FM40 comes with 3.5MM headphone monitoring and 3.5MM camera, computer, video camera and other multi-device signal input, and the powerful lavalier on the back integrates a hidden hot shoe socket, making the lapel clip both installed on the equipment hot shoe and it can also be quickly clamped in the use of any object on the two-in-one fixed scheme.Item Name: Lavalier MicrophoneMaterial: ABS, MetalModel: FM40Frequency Range: 566-594Wireless Type: UHFDirectional: Omni-directionalSensitivity: -33DBInput: 3.5mm TRS for Lavalier Microphone and External Audio InputOutput: 3.5mmTRS (Camera)+3.5mmTRS (Headphone Monitoring)Working Distance: 30m to 80m (Open Environment)Battery Life: TX-3.5 Hours, RX-5 HoursBattery Type: Built-in 800mAh Battery (Included)Charging Port: Type-CCharging Voltage: DC-5VWireless Antenna Gain: 18dbmChannel Quantity: 57Storage Temperature: -25 Degrees Celsius to 45 Degrees CelsiusWorking Temperature: -10 Degrees Celsius to 45 Degrees CelsiusFeatures: Universal, Portable, Wireless, DurableWithout Back Clip Size: 42.5mm x 45.2mm x 17.2mm/1.67" x 1.78" x 0.68" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Transmitter1 x Receiver1 x Storage Pouch1 x USB Power Cord1 x TRS-TRS Line1 x TRS-TRRS Line1 x Lavalier Microphone1 x Lanyard