Feature: 1. Wireless microphone system with 1 headset microphone, 1 body pack transmitter and 1 mini receiver. 2. UHF wide band frequency, stable transmission and low distortion. 3. 48 selected channels and 48 random ID, strong ability of anti-interference. 4. The receiver with 6.35mm(1/4\") connector, you can connect it to your speakers or amplifiers easily. 5. Max. effective transmission range in open area is about 30 meters, suitable for public speech, classroom teaching, business meeting, etc. Specification: Features: Wireless microphone system with 1 headset microphone, 1 body pack transmitter and 1 mini receiver. UHF wide band frequency, stable transmission and low distortion. 48 selected channels and 48 random ID, strong ability of anti-interference. The receiver with 6.35mm(1/4") connector, you can connect it to your speakers or amplifiers easily. Max. effective transmission range in open area is about 30 meters, suitable for public speech, classroom teaching, business meeting, etc. Specifications: --System Frequency Bandwidth: 50MHz Modulation: Broadband FM Number of Channels: 48 channels The Peak Frequency Deviation: ± 45KHz Frequency Responses: 80Hz-15KHz S/ N Ratio: ≥50dB T.H.D. (Overall): ≤2% Working Distance: 30m no obstacles Working Temperature: -10℃-55℃ --Receiver Sensitivity: 5dBuV Spurious Suppression: >80dB Audio Output: 1/4" unbalanced output 400mV/3KΩ Power Supply: 2 * AAA Batteries(not included) Receiver Size: 7 * 2.7 * 2.3cm / 2.8 * 1.1 * 0.9in Receiver Weight: 29g / 1oz(without batteries) --Transmitter Transmitter Power: max. 30mW Transmission Stability: ＜30ppm Dynamic Range: ≥100dB(A) Frequency Responses: 50Hz-15KHz Sound Pressure: max. 130dB SPL Power Supply: 2 * AA Batteries (Not Included) Transmitter Size: 11 * 6 * 2cm / Transmitter Weight: 63g / (without batteries) Package Size: 29.5 * 13 * 6.5cm / 11.6 * 5.1 * 2.6in Package Weight: 322g/ 11.4oz Package List: 1 * Microphone 1 * Receiver 1 * Transmitter 1 * Users' Manual(English) Package List: 1 * Microphone 1 * Receiver 1 * Transmitter 1 * Users' Manual(English)