This is photoMate 887, an all-in-one portable GPS data logger. It features 66-channels GPS receiver with a sensitivity up to -165 dBm and internal memory that can store up to 125,000 way points. There are also Smart Power Save Mechanism and AGPS support. It utilize Bluetooth technology for data transmission.
The photoMate 887 measures just 44 x 26 x 15mm and weighs only 18g. It is priced at $76.85.