Dolphin Echo
#25 in CordedFull review
A low-cost floor-and-wall robot for pools up to 33 ft.
Leslie's $524.30$524.30
The Dolphin Echo and the Polaris ERA 710 are evenly matched, rated 3.2 and 3.2. The Dolphin Echo costs $74.70 less ($524.30 vs $599).
Polaris ERA 710
#26 in CordedFull review
A budget corded Polaris for smaller in-ground pools.
Walmart $599$599
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every corded robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dolphin Echo | Polaris ERA 710 |
|---|---|---|
| Overall rating | 3.2/5 | 3.2/5 |
| Value 25% | 68 $524 | 62 $599 |
| Cleaning 25% | 60 Floor and walls | 60 Floor and walls |
| Navigation 15% | 50 Smart scanning | 50 navigation not published (neutral score used) |
| Warranty 15% | 50 2-year warranty | 50 warranty not published (neutral score used) |
| Pool size 10% | 27 pools up to 33 ft long (about 540 sq ft) | 39 pools up to 36 ft long (about 650 sq ft) |
| Features 10% | 0 0 of 3; no app control, scheduling, swivel cable | 0 0 of 4; no app control, scheduling, swivel cable, caddy |
Specifications
| Dolphin Echo | Polaris ERA 710 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 33 ft long | Up to 36 ft long |
| Pool types | In-ground and above-ground | In-ground |
| Cleaning | ||
| Cleans | Floor and walls | Floor and walls |
| Surface skimming | No | No |
| Filter | Fine Filter Kit, top access | 3 L canister |
| Filter capacity | - | 3 L |
| Water flow | 4,000 gal/h | - |
| Power | ||
| Power | Corded | Corded, 50 ft cable |
| Run time | Longest cycle 2 h | Longest cycle 2 h 30 min |
| Swivel cable | No | No |
| Navigation & app | ||
| Navigation | Smart scanning | - |
| App | No | No |
| Scheduling | No | No |
| Retrieval | - | Tap & Lift: tap with a pole and it climbs to the waterline |
| Caddy included | - | No |
| Build | ||
| Weight | 14.8 lb (6.7 kg) | - |
| Warranty | 2 years | - |