Features:  Features of bite alarm:  LED alarming signals with high output speaker.  High visibility LED latching about 40 second memory.  Adjustable sensitivity, volume, tone button.  256 variable code to prevent interference from another angler.  Extra jack for illuminated swinger.  Special rubber finished surface.    Features of receiver:  Design with antenna.  Operating range more than 100m.  Screen to indicate number of bite alarm.  On / off, sound, vibration button.  Output speaker.  Automatically paired.    Features of swinger:  4 LED illuminated swinger with different light colors.  Stainless steel material.  When the fish comes to your hook, it will give you signal.    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℃    Swinger:  Light color: Red, Yellow, Blue, Green  Material: ABS & Stainless steel    Specifications:  Bite alarm size: 9 * 5 * 4.5cm / 3.5 * 2.0 * 1.8in  Receiver size: 17.5 * 6.2 * 3.9cm / 6.9 * 2.4 * 1.5in  Swinger length: 23cm / 9.1in  Zippered case size: 29 * 27 * 6.5cm / 11.4 * 10.6 * 2.6in  Total weight: 1009g / 2.22lb    Package List:  4 * Bite Alarm  1 * Receiver  4 * Swinger  4 * Weight  1 * Zippered Case  1 * User Manual (English)