What's in the box:

Baomic BM-12/V2 Professional UHF Wireless Instrument Microphone System

Features:
Professional wireless system receiver & transmitter with microphone special for Saxophone, as well as for other wind instrument if the clip size available.
Easy to fix on saxophone conveniently and firmly, protective rubber keeps your valuable sax from scratching.
Reliable UHF, high signal-to-noise ratio, stable signal transmit. UHF frequency range: 630-690MHz.
6.35mm audio output plug, easy-to-read LCD display.
Effective operating range up to 50m in open areas.
Completed with configured 3.7V Li-ion batteries for the receiver, comes with adapter for charging.
Ideal for stage performance, KTV, and home party use.

Specifications:
Brand: Baomic
Model: BM-12/V2
Material: Plastic & Metal
Suit for: Saxophone French Horn Trumpet Trumbone

--Comprehensive Performance:
Carrier Frequency: UHF 630-690MHz
Frequency Stabilization: <30ppm
Dynamic Range: >90db
Total Harmonic Distortion: <0> Frequency Response: 40Hz~15Hz3dB
Audio Output Level: 400mV
Power Adapter: US AC100-240V

--Receiver:
S/N Ratio: >90dB
Image&Spurious Rejection: >80db
Border upon Channel Rejection: >80db
Receiving Sensitivity: >10dBu (Sinad=30dB)
De-emphasis: 75uS
Battery Life: Approx. 4.5h
Size: 7.5 * 5 * 1.5cm / 3 * 2 * 0.6in

--Transmitter:
Power: 30mW
Modulation Type: FM
Deviation: 25KHz
Spurious Emission: >40dB
Battery Life: Approx. 3.5h
Size: 8.5 * 3 * 2cm / 3.4 * 1.2 * 0.8in

Package List:
1 * Receiver
1 * Transmitter
1 * 3.7V Battery
1 * Adapter
1 * USB Cable
1 * Clamp Mic
1 * Mic Sponge
1 * User Manual