Description: UHF free frequency modulation, plug and play. Two Microphones: Headset / Lavalier Microphone, switch freely to meet your needs in different situations. LED Display: Clearly display data such as power, signal, and FM frequency. All-metal material, mini bodypack transmitter and rechargeable receiver, stylish, wearable and durable. Long-distance receiver, stable receiving within 100 meters. 1/4 Output: Supports Mic input 3.5mm/6.5mm port, Not supports line-in 3.5mm port. Specification: Material: Alloy Mini Receiver Size: 93x31x20mm Modulation Mode: Digital Frequency Modulate Frequency range: 500MHz-980MHz Debug mode: Dqpfsk Frequency response: 75Hz-18KHz±3DB Preset frequency: 25 (automatic pairing) Max. Deviation Range: ±50kHz (with level limiting) Signal to noise ratio: ＞98DB Battery specifications: built-in 450mAh lithium battery Mini Receiver Battery Life: up to 6hours Bodypack Transmitter: up to 10 hours Note: 1.Do not use it with audio device without "MIC IN" 2. The microphone without speaker. Package Includes: 1 Piece Headset Microphone 1 Piece Lavalier Microphone 1 Piece Bodypack Transmitter 1 Piece Rechargeable Receiver 1 Piece Instruction Manual Note: Please allow 1-3mm deviation due to manual measurement.(1mm=0.04inch) Color might be slightly different due to the color calibration of each individual monitor.