MXO's Optional, Nano JST RECIEVERS with Hidden antennas. Extremely light, small and compact footprint, attractive, light weight and removable protective case with connection information makes for a very desirable receiver without the exposed antenna problems. Weight: 1.25 Grams * Size: 14.6 X 21.4 X 8.2mm * Operating voltage: 3.7-8.5 * Connectors: JST-ZH, 1.5mm pitch