Features 1、Made of ABS engineering plastic, it is impact-resistant, heat-resistant, low-temperature-resistant, chemical-resistant and has excellent electrical properties. 2、Sensitive central axis roller, captures signals with a light touch. 3、The transmitter has LED flashing and sound alarm, different lights and sounds for line pulling and returning. 4、The receiver operates at a distance of ≥200 meters, with six LED lights automatically corresponding to the color of each transmitter. 5、Both the transmitter and receiver are waterproof, suitable for various weather conditions. Electronic wireless fishing alarm, making fishing easier and smarter. Features: Made of ABS engineering plastic, it is impact-resistant, heat-resistant, low-temperature-resistant, chemical-resistant and has excellent electrical properties. Sensitive central axis roller, captures signals with a light touch. The transmitter has LED flashing and sound alarm, different lights and sounds for line pulling and returning. The receiver operates at a distance of ≥200 meters, with six LED lights automatically corresponding to the color of each transmitter. Both the transmitter and receiver are waterproof, suitable for various weather conditions. Specification: Material: ABS Weight: 550g/ 19.4oz Transmitter: Operating frequency: 433.92MHZ Voltage: 3-5V Transmission distance: ≥ 100M Current: 30mAh Operating temperature: -30℃-70℃ Battery: 3pcs AAA batteries (not included) Size: 9.5*4*4cm/ 3.7*1.6*1.6in Receiver: Operating frequency: 433.92MHZ Voltage: 9V Receiving sensitivity: -110dbm Current: 30mAh Operating temperature: -30℃-70℃ Battery: 3pcs AAA batteries (not included) Product size: 9*4.5*4.5cm/ 3.5*1.8*1.8in Package list: 1 * receiver 4 * transmitter Package List 1 * receiver 4 * transmitter