| CPU | 64 bit RISC Processor |
| Main memory | 32 MB |
| Program supplying media | AIBO-ware Memory Stick (sold separately) |
| Degree of freedom | Head : 3 degrees of freedom |
| Input/Output | Battery charge connector |
| Volume adjustment switch | |
| Image Input | 100,000 pixels CMOS image sensor |
| Audio Input | Stereo microphones |
| Audio Output | Speaker |
| Built-in Sensors | Infrared Distance Sensor |
| Acceleration Sensor | |
| Touch (inside of head) Switch (tail, & bottom of legs) | |
| Vibration Sensor | |
| Inclination Sensor | |
| Power consumption | Approximately 5W (regular mode) |
| Operating Temperature | 41F to 95F / 5C to 35C |
| Operating Humidity | 10% to 80% |
| Operating Time | Approx. 2.5 hours (with the use of fully charged ERA-301B1 in autonomous mode) |
| Battery charging time | Approx. 1.5 to 2 hours |
Dimensions (W x H x L) |
Approx. 7 x 11 1/8 x 9 1/2 in. / 177 x 280 x 240 mm |
| Weight | Approx. 3 lb. 5 oz. / 1.5 kg (including battery and Memory Stick) |
| Color | White (ERS-311)/Black (ERS-312)/Brown (ERS-31L) |
| Supplied Accessories | AC adapter, conversion plug, lithium ion battery pack, stand, pink ball |