Amplifier. Quantity is as shown in the image. Connectors are as shown in the image. Not changeable. ■■■■Important■■■■ ① Purchase without comment, silent purchase, immediate purchase OK. Please do not purchase if you are in a hurry. Please purchase only if you can wait patiently. ② Please purchase only if you understand without asking questions. Our listings are for advanced users. If you need to ask questions or need follow-up after purchase, please DO NOT purchase. We will not reply to questions. ③ We only sell what we are listing. ④ Shipping will be only by Yu-Packet Post. No other shipping methods are available. ⑤ All items listed are new. There is no warranty for any reason. For malfunctions during transportation, compensation will be provided through Mercari shipping, so please notify us via message before rating. We will negotiate with Mercari. ⑥ No price reduction. For combined shipping, a discount of 100 yen per additional item. Discounts are only for purchases combined into one. Please comment before purchasing to indicate the items you are purchasing. ■■■■■■■■■ This is a listing for a brushed amplifier for radio-controlled cars. New Made in overseas, no-brand product Amplifier Description LiPo battery 2 cells, 3 cells Nickel, Ni-Cd battery 5-9 cells 5V 2A LiPo cut-off equipped. For LiPo batteries, etc. ■■■■■■■■■■■■■■■ By changing the red parts Selection of battery type Back ON/OFF ■■■■■■■■■■■■■■■ Box and instruction manual are not included. The connector to be inserted into the receiver can be used with all manufacturers if you do some simple processing. Please check online for details. Auto setup, so no troublesome settings are required. If the front and back are reversed, change the settings on the transmitter or connect the motor in reverse. Generally, the red wire of the amplifier is connected to the negative of the motor, and it will work correctly. Of course, it has a reverse function. Since it is made overseas, please do not use it with low-turn motors. The supported turn number is unknown. Since it is an inexpensive new amplifier, the risk of breaking increases if used with a fast motor. ■No packaging■Anonymous shipping■ Shipped by Yu-Packet Post. We are not responsible for any compensation for accidents or loss during transportation, or any other reason. We will handle the Mercari compensation application.