DigiEspow Remote Control Dog Training Shock Collar for 2 Dogs with 100LV of Shock and Vibration Package Details:2 * Receivers ;1 * Transmitter ;2 * Collar straps ;2 * 4LR44/ 6V Batteries ;4 * AAA 1.5V Batteries ;2 * Test lights ;4 * Long replacement probes ;4 * Short replacement probes ;1 * User Manual With LCD display.Modes: static/vibrate/beep.Remote range up to 300 meters.100 levels of vibration and static.The levels can be altered by the up & down button of the transmitter.The transmitter will turn into STANDBY MODE if there is no operation after 2 minutes and turn off after 5 minutes.The receiver is water resistant.Receiver and transmitter are powered by batteries.Adjustable collar strap is suitable for most small and medium dogs.It is for mild-mannered to stubborn disposition dogs. Matching Receiver with Transmitter: 1. Install the batteries (2 x 4LR44/ 6V) in the transmitter and ensure the polarity is correct. 2. Adjust the channel button to the right one you want to stay. 3. Install the batteries (4 x AAA 1.5V) in the receivers. 4. There is a beep right after installing the batteries in the receiver. 5. Press the Launch button from the transmitter to encode the transmitter and the receiver immediately. There is a beep again from the receiver if you encode successfully. 6. Replace cover and tighten metal probes.7. If there is no response from the receiver, restall the batteries from the receiver and press launch button again. 8. This system could train up to 2 dogs at the same time. To encode different dogs, just change to different channel and repeat the procedures as described again. Specifications:Usage: Training & behaviour aids ;Frequency: 433.825MHz ;Power supply: Transmitter: 2 x 4LR44/6V batteries (included); Receiver: 2 x AAA/1.5V batteries (included) ;Strap material: Nylon ;Adjustable strap length: Approx. 36cm-48cm / 14.2-18.9in ;Transmitter size: 12.8 * 4.8 * 2.8cm / 5.0 * 1.9 * 1.2in ;Receiver size: 7 * 3.6 * 3.8cm / 2.8 * 1.4 * 1.2in ;Package size: 16.5 * 14.5 * 4.5cm / 6.5 * 5.7 * 1.8in