What's in the box:

Chuango 315MHz Wireless Sound Strobe Siren Flash Light Alarm Outdoor Waterproof Compatible with 315MHz Alarm Host G5/A11/B11/H4 Plus, Remote Control, Door Sensor, PIR detector (Blue)

Note: This wireless Chuango 315Mhz WS-105 siren only can work with the 315Mhz alarm panel(G5/A11/B11/H4 Plus), can't work with the 433MHz alarm panel.

Features:
The WS-105 is completely free of wires, easy installation.
Piercing 90dB siren. 3.7V rechargeable lithium battery, more power saving.
Compatible with Chuango 315MHz alarm panels(G5/A11/B11/H4 Plus) and sensors, such as remote controls, door/window contact sensors and PIR detectors, etc.
When connected to an alarm system and an intrusion occurs, the WS-105 will sound with the strobe light flashing.
It is an effective crime deterrent.

Specifications:

Maximum Siren Volume: 90dB
Backup Battery: 3.7V 600mAh rechargeable lithium battery, 2.22Wh(included)
Alarm Current: < 100mA> Static Current: < 13mA> Radio Frequency: 315MHz
Housing Material: PC+ABS plastic
Item Size(L * W * H): 90*90*42.2mm
Package Size: Approx. 12.5*12.5*6cm / 4.9*4.9*2.4in
Package Weight: Approx. 160g / 5.6oz

Package List:
1 * Wireless Indoor Siren