Grundig 871125224982 Manuel D'utilisation page 3

How to replace the battery
1. Open the case from the edge
2. Replace the battery
3. Close the case
Specifications:
Battery: 3V DC/0.01A
Frequency range: 2402-2480 MHz
Batteries remote control: CR1632 (included)
E.I.R.P: -2.69 dBm
5V DC/2A