Features 1、Include: 1 * Receiver, 6 * Transmitter, 1 * User Manual and 1 * Storage Box 2、Low battery signal. 3、LED alarming signals with high output speaker(drop back with different Tone and green /u0026 red LED). 4、High visibility LED latching about 40 second memory. 5、Adjustable Sensitivity, Volume, Tone button. 6、Extra plug for swinger(not included). 7、Separate battery compartment. Powered by a 9v battery(not included). 8、Special rubber finished surface. 9、256 variable code enough to prevent interference from another angler. 10、Over 100m transmission range. 11、On/off, Sound, vibration button. 12、4 different color LEDs to match 4 different alarms. 13、Receiver will sounds when received signal, and number indicated on screen. 14、Inside automatic variable code repair function. Specification: -Transmitter Work volt: 9v Work current: 30mA Standby current: 0.15mA Off current: 6uA Work frequency: 433.92MHZ Modulate mode: ASK Transmission range: >100M Work temperature: -30°C-70°C -Receiver Work volt: 9 v Work current: 30mA Standby current: 2.5mA Off current: 3uA Work frequency: 433.92MHZ Modulate mode: ASK Receive sensitivity: -110dbm Work temperature: -30°C-70°C Box size: 32 * 22 * 6cm / 12.5 * 8.6 * 2.3in Package List 1 * Receiver 3 * Transmitter 1 * User Manual (English) 1 * Storage Box