| Price | $399 | $999 | $599 (no wheel) | $799 (no wheel) | $1499 | $899 | $2295 (pedals only) | $729 (no cranks)/$749 (cranks) | $729 (no cranks)/$749 (cranks) | $1645 (with cranks) | $1299 (R with cranks, no chainrings)/$1399 (RS) | $1099 (with cranks, no chainrings) | $529 (left crank arm only) |
| Available today | Early 2014 | October 2014 | Yes | Discontinued | Yes | Fall 2014 | Yes | Yes | Yes | Discontinued (Riken is replacement) | Yes | Yes | Yes |
| Measurement Type | Crank Arm | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force | Direct Force |
| Attachment area | Left arm (2015), Dual (2016) | Cleats | Rear Wheel Hub | Rear Wheel Hub | Pedals | Left Pedal | Pedals | Crank Spider | Crank Spider | Crank Spider | Crank Spider | Crank Spider | Left Crank |
| Attachment limitations | Specific crank-arm models | Speedplay pedals | N/A | N/A | Look Keo Compatible pedals only | Look Keo Compatible pedals only | Look Keo Pedals Only | Specific supported cranks | Specific supported cranks | Specific supported cranks | Specific supported cranks | Specific supported cranks | Specific supported cranks |
| Weight (additional/net) | +/- 1% | 35g per shoe | 315g/325g (full hub) | 446g (full hub) | 175g per pedal (inclusive) | 175g per pedal (inclusive) | 24g | From 189g + crank | From 189g + crank | 884g (including crank) | Elsa R: 576g/Elsa RS: 616g (including cranks) | From 659g (including cranks) | 20g |
| Wireless Connectivity Type | ANT+ & BLUETOOTH SMART | ANT+ | ANT+/Bluetooth Smart (depends on cap) | ANT+ | ANT+ | ANT+ | Polar W.I.N.D. | ANT+ | ANT+ | ANT+ | ANT+ | ANT+ | ANT+ & Bluetooth Smart |
| Unit auto-turns on when on bike | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes |
Battery | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Battery Life | 120 hours | 16 hours | 300 hours | 400 Hours | 175 hours | 175 hours | 465 hours | 300-400 hours | 300-400 hours | 400 Hours | 300 hours | 300 hours | 200 hours |
| User or Factory battery replacement | Yes | User | User | User | User | User | User | User | User | User | User | User | User |
| Battery type | CR2032 | USB rechargeable | CR2032 | 2 x EPX76 | CR2032 | CR2032 | 2 x CR2354 | CR2450 | CR2450 | CR2450 | CR2032 | CR2032 | CR2032 |
| Low Battery Warning | Yes | Yes | Yes | Yes | Yes, 20 hours | Yes, 20 hours | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Features | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Measures/Transmits Cadence | Yes | Yes | Yes (Estimated) | Yes (Estimated) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Ability to update firmware | Yes | Yes | Yes | Yes | Yes | Yes | No | Factory Only | Factory Only | No | Qalvin App & USB ANT+ Stick | Qalvin App & USB ANT+ Stick | Yes |
| Transmits Left/Right Power Balance (Estimated) | No | YEs | No | No | N/A | No | N/A | Yes | No | No | Yes | Yes | No |
| Transmits Left/Right Power Balance (Measured) | Yes (if two pods used) | Yes | No | No | Yes | No | Yes | No | No | No | No | No | No |
| Transmits Pedal Smoothness | Yes (if two pods used) | Yes | No | No | Planned | No | No | No | No | No | No | No | No |
Accuracy | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Measures all power output | Yes | Yes | Yes | Yes | Yes | Left only | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Claimed Accuracy Level | 1% | +/- 2% | +/- 1.5% | +/- 1.5% | +/- 1.5% | +/- 1.5% (of left leg) | +/- 2% | +/- 2% | +/- 2% | +/- 2% | +/- 1.5% | +/- 1.5% | +/- 2% (of left leg) |
| Includes temperature compensation | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | N/A | Done at factory | Done at factory | Yes |
| Supports auto-zero function | Yes | Yes | Yes | Can configure only on CycleOps Units | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | No |
| Supports manual calibration | Yes | No | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes |
| Supports hanging weights (static test) | No | No | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | No |
Software | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Phone App to Configure/Test | Yes | No | No | No | Desktop App (PC/Mac) | Desktop App (PC/Mac) | No | No | No | Yes | Yes | Yes | Yes |
Purchase | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Amazon | Link | N/A | Link | Link | Link | Link | Link | N/A | N/A | Link | Link | Link | N/A |
DCRainmaker | 4iiii Precision Power Meter | Brim Brothers Zone | PowerTap G3 Hub | PowerTap Pro (Discontinued) | Garmin Vector | Garmin Vector S | Polar/Look Keo Power | Power2Max (Oct 12+) | Power2Max (Pre-Sept 2012) | Quarq Cinqo (Discontinued) | Quarq Elsa R/RS | Quarq Riken R | Stages Power Meter | | Review Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link |