... . 2 post E-lift 2. Single-side electro-release 3. easy,smooth&steady/safe operation 4. 3.5T ... close protection by dynamic hydraulic pressure, single side electrical release, ensure double safe staying for vehicles.6. ABS Control ... box, 24V operation system, manual lock release for emergency lowering valve. 7. Endure Max 5 T ... 3420 two post car lift YP2-40E (electric-magnetic release type)