7.83HZ Schumann Wave Generator Schumann Resonance Generator Sonic Version Helping Have A Sound Sleep

7.83HZ Schumann Wave Generator Schumann Resonance Generator Sonic Version Helping Have A Sound Sleep

Specifications:
- Version: Sonic Version
- Working mode: 7.83Hz extremely low frequency electromagnetic wave, without any sound. 7.83Hz extremely low frequency electromagnetic wave. Weak 7.83Hz odd harmonics can be heard when your ear is close to the device
- Power: weak 60mW; strong 180mW
- Endurance time: 7 days for weak level; 2 days for strong level
- Charging method: built-in 2000mA lithium battery. Use mobile phone charger with Type-c interface, featuring no current limit

Package Included:
- 1 x Main Unit
- 1 x Type-C Power Cable