Description: This transmitter uses professional transmitting transistor, which gives excellent audio quality. The audio port and microphone port are independent from each other. And the input signal is processed independently too, which can decrease the loss of sound quality in a large extent. Features: 1. Features at portable size, high quality, long broadcasting range and stable performance. 2. Adopt imported high quality electronic components, equipped with special antenna, stable signal, good secrecy, uneasy to be interfered. 3. Support memory card to broadcast mp3 format music 3.5mm AUX input: transmit music from your smart phone, computer, MP3 or CD player. 4. Designed with Stereo and Mono audio output, both line-in and microphone volume is adjustable by pressing the button. 5. Application to tourism, meeting room, campus, driving, teaching stadium, home wireless audio, simultaneous interpretation, camping etc. 6. LCD display, backlight function simple and convenient operation.7. You can manually adjust the signal strength. Transmission Distance (Diameter): 100m or 328ft at 1 or 2 level signal 300m or 984ft at 3 level signal 500m or 1640ft at 4 level signal.Specifications: Frequency: 60MHz - 108MHz (adjustable) Frequency Increase: 0.1MHz Frequency Stability: 10PPM Frequency Response: 50Hz - 1500Hz Signal to Noise Radio: 60dB Transmit Power: 0.01 or 10 or 100 or 200mW Transmission Distance (Diameter): 100m or 328ft at 1 or 2 level signal 300m or 984ft at 3 level signal 500m or 1640ft at 4 level signal Working Hours: 8 or 6 or 5 or 3 h Power: BL-5C Li-lon, 3.7V 1000mAh Charging Time: about 5 hours Support memory Card: Maximum 32GB Transmitter Size: 79 x 58 x 18mm or 3.11 x 2.28 x 0.71inch Antenna Height: 114.3mm or 4.5inch Package Weight: 217g Package List: 1 x FM Transmitter 1 x Antenna 1 x USB Charging Cable 1 x Microphone 1 x Clip 1 x Audio Cable 1 x Manual.