1. The mAT-705Plus tuner is powered by two built-in lithium batteries instead of alkaline batteries. The user no longer has to open the tuner housing to replace the battery. 2. The tuner uses the type USB charging port, so users can easily use the mobile phone charger to charge the tuner. 3. The new version of the tuner eliminates the mechanical power switch. Its power supply is automatically controlled by the transmitter. After connecting the control cable, it will be turned on and off along with the transmitter, no need to manually turn on and off. 4. The tuner uses a larger LED lens and is mounted on a PCB. Colour:black Material:Metal Package Contents: 1 x mAT-705Plus Tuner 1 x Charging Cable 1 x Control Cable Only the above package content, other products are not included. Note: Light shooting 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.