A lawn mower, in particular a reel lawn mower, can include an articulating swing-out arm for supporting a reel assembly. Applications include easy to handle glucose monitoring using a group of hollow out-of-plane silicon microneedles to sample substances in interstitial fluid from the epidermal skin layer. A periodic distance greater than about 9 mm is between the second fibers of the second material oriented at the first direction. The rectifier unit has input terminals disposed to correspond to the bundles and respectively connected to the output lead wires. Moreover, this technology is easily adapted to current methods of fabricating electroplated interconnects such as C4s. This permits that the construction of the accelerometer housing, can be sealed hermetically; and the piezoelectric elements of the sensor have increased lifetime, with enough partial pressure of Oxygen inside the housing.