Shenzhen Smile Electronics Co. Limited

Dkl’s proprietary technology passively detects the non-uniform electric field generated by the electrical activity of the heart. Utilizing patented selective polarization filters (spf) that eliminate all other electric fields, lifeguard detects this unique ultra-low-frequency (ulf) field of the human heart through walls and other obstacles that absorb, reflect or deflect higher frequency emissions. The product is effective at a range of up to 500 meters in the open and at shorter distances through concrete walls, steel bulkheads, brick, earthworks, plastics, heavy foliage, water, and other barriers.
the hand-held dkl lifeguard uses a patented new technology to make even the toughest searches faster and safer.