SONY RM-SM100B Remote Control - Brand: SONY - Model: RM-SM100B - System: SYSTEM AUDIO - Requires 2 AA batteries (batteries not included) This is a remote control for Sony audio equipment. It's for an older model, but its operation has been confirmed. Please check the model number before purchasing. There are some minor scratches and scuffs from use. Please consider this a used item and understand its condition before purchasing. It will be shipped in simple packaging.