SPEC:
Size: 119×45×23 (mm)
Battery :AAA battery *2
Max Key :9 key

IR remote controller.

Highlights:
1. Operates Russound CAS44 multi-room music systems and up to four additional devices
2. Learns IR codes from your existing remote controls
3. Pre-programmed for many brands of audio/video gear
4. "all off" function turns off all keypads from a single location
5. Uses 2 "AA" alkaline batteries (included)
6. Warranty: 2 years