Item Type: Camera Flash Material: Plastic Built-in lithium battery: 7.4V, 300mAh Input: 5V, 0.6A Charging time: Approximately 1 hour and 10 minutes Number of flashes (1/1 stop): Approximately 700 Recycling time (1/1 stop): Approximately 1.5 seconds Flash power range: 1/32 to 1/1, adjustable in ±1/3 steps Operating temperature: -10°C to +50°C Sync trigger: Hot shoe Size: Approx. 7 x 4 x 3cm/ 2.8 x 1.6 x 1.2in Weight: Approx. 52g/ 1.8oz