When people buy a mini camera, they usually want the camera to be small and to work for a long time, but it's actually very difficult to balance. Because the larger the battery capacity required, the larger the corresponding volume of the battery This is the reason why we developed the TY9 mini camera, which is specially designed for use with a power bank supply; because there is no need to consider the battery problem, the volume can be made small, and with the power bank supply, it can achieve long-term work; TY9 size:2.3x1.3x0.5in, weight:21g; USB interface, plug and play, can be well integrated with the current mainstream power bank; whether you need to carry it with you, or put it or in the company, it can carry and hide it well . Colour:black Material:plastic Package Contents: 1 x Wireless WIFI Camera Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.