12V 2. 4G Remote Control bluetooth receiver. The first use (or replace the battery) need to matching frequency Product is Applied to Specific Children Riding Toys,Please Make Sure the Purchased Part Has Same Appearance as the One. Step 1. Install two AAA 1.5V batteries(not included), (note the positive and negative polarity inside the battery chamber), and finally close the battery cover, indicator will flash three times indicates that the battery is installed correctly. Step 2. Press and hold the frequency key(car select) for about 2 seconds and the indicator will flash Step 3. Turn on the power supply of the car and the indicator will turn off Step 4. If the matching frequency is unsuccessful (indicator not turn off), please turn off the power supply and repeat steps 2 and 3. Type:C:Blue Receiver Colour:White & Blue Material:Plastic Package Contents: 1 * Children's Electric Car Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.