You might want to check the user manual for the wearable. If you happen to have the Letscom fitness tracker especially the model ID115 fitness tracker. If you are looking for a lightweight fitness tracker, one of the ID Letscom fitness tracker is one of the best pick wearable. The wearable has a TPU strap with flexible strap and with a classic stainless steel buckle. The wearable has a direct charging USB feature, just remove the strap and it will expose the USB charging port. The fitness tracker has a slim design, looking like one of the Fitbit fitness tracker. One of the popular model is the Letscom fitness tracker ID115 model. Its fitness tracker models are slim, light and with sporty design, no wonder it is very popular among wearable fans especially for those who are looking for a lightweight fitness tracker. Its fitness tracker is very popular ranging from ID115 model to ID152 to ID130 and other popular models. Letscom company has several wearables in its line-up.