I purchased this running computer directly from Amazon. On the box was "RS400sd" and "RS400 RUN". The scope of delivery is very good. There are the clock, a textile chest strap with attached via snaps transmitter, a stride sensor S1, a Polar IR -USB adapter, a USB cable, the Polar Coach contain 5 SW and a guide book and all the necessary batteries. The training diary of the software is very motivating. The heart rate belt is worn very comfortably. The transmitter works with a Life Fitness treadmill 7.0. According to the Polar Customer Service, who has reported quickly and competently to my customers request by email, the sender with ergometers and treadmills work which recipients of the (conventional) have built 5kHz technology. That was important to me, and therefore ruled out a heart rate monitor with 2.4 GHz technology (eg wind) for me from. The S1 foot pod can calibrate itself, so that even with treadmill training quite useful route information is recorded.
Great package at an affordable price - 5 star for this product