Feature: 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: 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