The Panasonic DMW-BTC12 is a set of two digital camera chargers that can be charged via USB connection. This is a re-listing. I was originally selling it as a set with the BP-51, but it was deleted twice by the administration, so this listing is for the charger only. I used it with a Sigma fp. I used it about 1 or 2 times. - Model Name: DMW-BTC12 - Brand Name: Panasonic - Quantity: Set of 2 - Connection Type: USB Thank you for looking. sigmafp fp lumix