It is used to repeat HB brand solar powered active detector signal to long distance receiver.
Main functions and features:
1.It automatically learns HB brand wireless solar powered detectors.
2.It can repeat maximum 50 pairs of solar powered wireless active detectors.
3.It supports maximum 4 levels of 4 repeaters to transmit to longer distance.
4.It should be installed indoor to avoid water or lightning stroke.

Specification:
1.Frequency: 433MHz
2.Operating Voltage:12V~15V
3.Operating current under receiving mode: 46mA
4.Operating current uder transmitting mode:290mA~300mA
5.Transmitting Distance:1km (1 level)
6.Operating temperature: -40℃~85℃
https://www.vedardalarm.com/hb-solar-powered-wireless-signal-long-rang-repeater-p-81