Size: 75*47*18mm 2 models: 44/45/46MM, 40/41/42MM 3 colours: white, blue, brown 44/45/46MM for S7/8/9/10 40/41/42MM for S7/8/9/10 Multi-protection: Ten protection levels such as overcharge, overcurrent, high temperature, foreign object recognition, etc, safer and more secure. 1200mAh large capacity, replenish power for Apple Watch at any time, say goodbye to low battery anxiety. Mini design, easy to put into your pocket or bag, carry it with you on business trips, travelling and sports