Unfortunately the advertised distance of up to 100 meters does not reach - on foot, yes, but the BT connection is not ... But I do not as tragic, because I use the BT adapter to the notebook in order to use the mouse (as a substitute for TouchPad) and headphones - do not remove 100 feet of it, because I feel no desire with binoculars to follow the mouse movements on the screen but simply to enjoy tangle-mouse and headphone comfort. And does the BT adapter very well and a lot more, if desired (keyboard control, modem function, data transmission, network connection, etc.) The part is not the "cheapest", but is processed very good and high quality. The delivery includes an installation CD with user manual as a PDF file - but only in English. Anyone whose is not powerful, is not it, in the I-NET translate to get "blue tooth" in hope. Those who value solid construction with minimal dimensions and optimal function, is certainly operated correctly with this product.