Cadenza S behind-the-ear (BTE) analog hearing aids with classic Class-D circuit, natural sound, easy operation and low battery consumption, it is non-programmable hearing aids. More convenient for dispenser sales, and also, more convenient for user to change volume through handy VC. Cadenza S analog hearing aids use Zinc-Air battery 13A, with VC +LC+HC. Suitable for Mild-to-moderate user with conduction, sensorineural and mixed 85 dB hearing loss. Cadenza S analog hearing aids are durable, practical and easy-to-use, can be sold at super markets, pharmacy shops, online shops and hearing clinics etc.