Adopting ABS plastics, excellent impact resistance, heat resistance, low chemical resistance and good electrical properties. Adopt KB-PCB double-sided circuit board with good quality and long service life. The sensitive central axle roller can be touched to capture the signal and send out the beeping sound and light warning. The indicator LED lamp is always bright and clear. Low standby power consumption, energy saving and environmental protection. Specification: Condition: 100% Brand New Material: ABS Color: black Receiver Battery: AAA battery (Not Included) Launcher Battery: 12V LR23A battery (Not Included) Launcher size: approx. 11.5x3.8cm/4.5x1.5inch Receiver size: approx. 9.6x5cm/3.8x2inch Features: LED ALARMING - The indicator LED lamp is always bright and clear. When emitter giving an alarm, the correspondent LED light set in the receiver would also flash to alert;different color of light for better distinguish CARP FISHING ALERT - The sensitive central axle roller can be touched to capture the signal and send out the beeping sound and light warning HIGH QUALITY - Adopting KB-PCB double-sided circuit board with good quality and long service life;Adopting ABS plastics, excellent impact resistance, heat resistance, low chemical resistance and good electrical properties POWER SOURCE - Receiver battery is powered by AAA battery (Not Included); Launcher is powered by 12V LR23A battery (Not Included) PACKAGE CONTENT -4 x Emitter,1 x Receiver, and 1 x Manual Package Includes: 1 Fishing Bite Alarm Listing and template services provided by inkFrog