Features: Features of bite alarm: 8 LED indication. Adjustable sensitivity, volume, tone button. 256 variable code to prevent interference from another angler. LED alarming signals with high output speaker. High visibility LED latching about 30 seconds. Extra jack for illuminated swinger (NOT included). Features of receiver: Operating range more than 100m. 4 different color LEDs to match 4 different alarms. On / off, adjustable volume, vibration button. LED alarming signals with high output speaker. Automatically paired. Night light. Technical Parameter: Bite alarm: Work volt: 9V Work current: 30mA Standby current: 0.15mA Off current: 6uA Work frequency: 433.92MHZ Modulate mode: ASK Transmission range: 100m plus Work temperature: -30 ~ 70℃ Receiver: Work volt: 3-5V Work current: 30mA Standby current: 2.5mA Off current: 3uA Work frequency: 433.92MHZ Modulate mode: ASK Receive sensitivity: -110dbm Work temperature: -30 ~ 70℃