MSMA (monosodium methanearsonate) is an arsenic-based grass killer. It kills grassy weeds such as crabgrass and goosegrass without harming most turfgrasses. It contains organic arsenic that, according to the University of Tennessee Extension, is less harmful than aspirin.
There are several styles of hearing aids available, from the smallest - Invisible in the Canal (IIC) to the largest and strongest - Power Behind the Ear (BTE), and the very popular Receiver in the Canal (RIC) - made to fit most hearing losses while remaining nearly unseen.
Receiver in the ear (RITE) hearing aids. Receiver in-the-ear (RITE) (or loudspeaker in-the-ear) aids are often smaller than BTE aids because some part of the device sits inside the ear. Like open ear BTEs, they can be easier to put in than an earmould if you find fiddly tasks awkward. There are different RITE hearing aids for different levels of hearing loss.