Features: <br />Features of bite alarm:<br />- LED alarming signals with high output speaker<br />- 40s memory LED， flashing when bite and turn on / off<br />- High visibility latching LED， drop back with different colors LED<br />- Adjustable sensitivity， volume， tone button<br />- 256 variable code to prevent interference from another angler<br />- Extra jack for illuminated swinger<br />- Special rubber finished surface， durable and have a good hand feeling<br />- Battery: 1 x 9V packed cell ( Not included )<br /><br />Features of receiver:<br />- Design with antenna to receive signal<br />- Four colors LED light match with same color in bite alarm respectively<br />- With night light， convenient to check the data on screen at night<br />- Receiver will sound when received signal and number indicated on the screen<br />- Inside automatic variable code pair function<br />- Battery: 3 x 1.5V AAA battery ( Not included )<br /><br />Parameters: <br />Bite alarm: <br />Work volt: 9V<br />Work current: 30mA<br />Standby current: 0.15mA<br />Off current: 6uA<br />Work frequency: 433.92mHz<br />Modulate mode: ASK<br />Transmission range: More than 100m<br />Work temperature: -30 - 70 Deg.C<br /><br />Receiver:<br />Work volt: 3 - 5V<br />Work current: 30mA<br />Standby current: 2.5mA<br />Off current: 3uA<br />Work frequency: 433.92mHz<br />Modulate mode: ASK<br />Receive sensitivity: -110dbm<br />Work temperature: -30 - 70 Deg.C<br />Model Number: JY-37 Package <br /><br />Package Contents: 4 x Bite Alarm， 1 x Receiver， 1 x Zippered Case， 1 x English User Manual， 1 x Bilingual Manual