Features:
VHF 180-250MHz frequency wireless dual channel microphone system.
Multilevel high frequency and middle frequency narrow band filter to avoid interference signal.
1/4" mixed output interface.
Effective working range up to 30m / 100ft in open-area.
There are 2 buttons for adjusting A/B channel volume separately? with indicator light.
The mic run on 9V batteries(not included).
Comes with a 1/4" audio cable.
Suitable for stages? ballrooms Karaoke? families party? as well as for giving a speech? presentation? public address.

Specifications:
--System:
Audio Range: 170 - 270MHz(VHF)
Dynamic Range: > 80dB
T.h.D: < 1%
S/N Rate: > 80dB
Working Range: Max. 30m / 100ft(in open area)

--Receiver:
Sensitivity: 30dB/uV
Audio Output: > 25mV
Plug: EU
Powered Supply: 6A 250V~
Power: 1W
Receiver Size: 22 * 14 * 4cm / 8.7 * 5.5 * 1.6in
Receiver Weight: 381g / 13.5oz

--Microphone:
Material: Plastic
Connecting Mode: FM
Powered Supply: 9V Batteries(for one mic? batteries are not included)
Mic Size(single): 24 * 4 * 4cm / 9.5 * 1.6 * 1.6in
Mic Weight(single): 126g / 4.4oz

Package List:
2 * Microphone
1 * Receiver
1 * Audio Cable
1 * User Manual(English)

Note:
AA batteries are not included.