Bluetooth wireless microphone connected to Smartphone

Microphone Microphone Microphone, Microphone UHF Dual Channel Bluetooth Microphone System.
Wireless microphone details
1. Use UHF Technology, Give You Clearr Sound Quality, Signal Stability, No delay, Anti-Howling, Anti-Jamming.
2. Working Range: UHF Up to 160 FT, BLUETOOTH RANGES IS 10 m. Function on the Handhold Microphone
4. Bluetooth 4.2 Available, Search the Bluetooth "Bietrun 08" in the Bluetooth Device List and Connect It. Sound: Echo, Reverberation Regulation 10 Levels Treble, High Pitch Adjustment, 8 Levels Bass, Bass Adjust, 8 Levels
7. Volume Adjustable: 5 Levels Total
8. High Quality Martial Martic, STEL MICHOD MICOD MICOD MICOD MICOD MISHONONON
9. Large LCD Display: Power, Signal, Frequency, Channel Statues DisplaySystem Parameter:
Frequency Range: 520-830 MHz BR> Frequency Stability: ± 0.005%
Dynamic Range:> 110DB
Max Deviation: ± 45khz
Audio Frequency Reponse: 60 Hz -18KHz (± 3DB)
Total Harmonic Distortion: ≤0.5%. A Access : BNC/50 ω
Sensitivity: 12DBUV (80DB S/N)
Sensitivity Adjustment Range: 12DBUV
Spurious Suppression: ≥80DB
Maximum Output Electrical Level: +10DBV)
Output Power: 10 MW
Oscillation Mode: Pll
Power Supply: (2 No. 5 1.5V Alkaline Batteries)
Working Time: About 8 HOURS 6 months warranty.