Material ABS Controller: 14.5cm / 5.71 "* 4.7cm / 1.85" * 2.2cm / 0.87 " Receiver size: 6cm / 2.36 "* 3.5cm / 1.38" * 4cm / 1.57 " Hidden 20cm / 7.87 "-58cm / 22.83" Voltage is 3.7V Battery 300mA Overviews: This fully waterproof e-collar is very popular with the dog trainers and pet owners. Its training systems will help you to control and train your dog in effective range by a series of functions, including vibration alert, sound warning, electrostatic punishment, etc. With its remote design, you can remote bark stopping, running about correction, easy calling back, biting and fighting. It will be your good training assistant. Main Features: Fully waterproof design: the receiver has a super waterproof performance, so your pet can swim or walk in the rain with it Adjustable levels: levels of vibration and shock are adjustable from 1 to 99, and you are advised to try levels gradually to find the proper one when using this pet training system for the first time 3 training modes: shock / vibration / sound With blue backlight screen: can be used at night Long-distance remote control: the remote distance is 800m (without any disturbance) 3 channels: there are 3 signal channels on the remote transmitter, and it can control 3 receivers of the same model Auto power save: automatic standby mode and memory functions Adjustable collar size: the max adjustable length is up to 67cm, suitable for all size dogs Note: Please charge before first using Eliminate one misbehavior or teach one obedience command at one time, if the training gets too fast, your pet may become confused and repel Before using the shock mode to your pet, you should try vibration to your pet first Observe the dog's reaction and make sure the training intensity not too much Examine the contact area daily for signs of a rash or a sore If a rash or sore is found, discontinue use of the collar until the skin has healed Specifications: Input: 100 - 240V, 50 / 60Hz Output: 5V, 0.5A Transmitter battery voltage: 3.7V Receiver waterproof level: IP67 Battery type: lithium-ion battery (built-in) Transmitter charging time: 4 hours Transmitter standby time: about a week Receiver charging time: 4 hours Receiver standby time: about a week Packing list: 1 X Remote Transmitter 1 X Receiver Collar or 2 X Receiver Collars or 3 X Receiver Collars 1 X AdjustableStrap 1 X Rechargeable USB Charging Cable 1 X Charger 1 X Contactor 1 X Instruction Book