MIPRO ACT-51/ACT-5H Single Channel Handheld Wireless Microphone UHF.

Mipro  ACT-51/ACT-5H  Single Channel Handheld Wireless Microphone UHF.
ACT-51 -UHF single channel diversity receiver
 - 48 Selectable frequencries
 - One-touch autoscan
 - 100 m. opreating range
 - Carrier frequency range UHF 620~934 MHz.
ACT-5H - Handheld Transmitter
 - Cardioid Condenser Microphone
 - Silent ON/OFF Switch
 - LCD Display group ,channel & error code
 - 20-hour battery life ,2 AA alkaline battery
http://www.mipro.com.tw/link/2_1_1_2_2_act51.htm