This is a rare, first-generation Hitec X4 charger. I purchased it about ten years ago and used it approximately 50 times. I'm selling it because I haven't been able to use it very often. Please check the photos and understand that this is a used item before purchasing. I confirmed its functionality a few days ago using Tamiya Neo Champ and Amazon brand AA and AAA batteries. The Bluetooth lamp's solder seems to have come loose, and it rattles when shaken, but I've used it without any problems, such as overheating. The instruction manual has some stains. The other conditions are relatively clean for its age. Please comment if you don't need the manual. Charger functions: Charge, discharge, cycle charging, refresh, break-in LCD display: Charge (discharge) amount, current value, elapsed time, current voltage Charging current: 0.2~2.5A Discharge current: 0.1~1.0A Dimensions: 370g, 154✕104✕50mm I will pack it with packing materials and ship it via Yu-Packet Plus from Yu-Yu Mercari. If you have any concerns, please comment, and I will add more photos. You can also purchase it directly without commenting. Search terms: TAMIYA, Hitec Advanced X4, battery conditioning, internal resistance, battery capacity, discharger, delta peak cut, power source, Mini-Z, Ni-Cd battery, Ni-Cd battery, Tamiya Mini 4WD nickel-metal hydride battery, discontinued, out of production