Kalimba - western simplified and streamlined version of ancient African instrumens - Mbira. The key technical differences usually are symmetric tin layout with linear notes distribution and western equal temperament tuning, small size, soft lamels.
Kalimbas are not mass demand product and every instrument is hand made, is unique in details and can differ from shown on photos. During professional using kalimba requires basic care and moderately gentle handling, including tuning, especially after mailing. This can be done without any efforts or special knowledge - just remember that every acoustic musical instrument needs some respect.