Features: 7.2V/2000MAH Rechargeable Battery: The built-in Li-ion battery (7.2V/2000mAh) provides a quick recycle time of 0.1s-1.7s and over 500 full-power flashes. Enjoy hassle-free charging without the burden. Full TTL Functions: Offers support for High-Speed Sync (max. 1/8000s), front and rear curtain sync, FEC, multi flash, manual flash, and wireless ID settings. 2.4G Wireless Transmission Ports: The Xpro-F (available separately) is compatible with specific camera brands, enabling triggering of flashes and camera shutters up to a 50-meter distance. Overheat Resistance and Useful Functions: Guide Number 36 (m ISO 100, at 105mm), featuring 22 power output levels (1/1-1/128). Supports TTL/M/Multi/S1/S2S modes and 24-105mm auto/manual zooming with customizable C.Fn settings. Specifications: Model: V350-S, V350-N, V350-O, V350-F, V350-C; Guide No. (1/1 output at 105mm): 36 (m ISO 100); Flash Coverage: 24 to 105mm Auto zoom (flash coverage automatically adjusts to match the lens focal length); manual zoom; tilting flash head (bounce flash) rotates 0 to 270° horizontally and -7° to 90° vertically; Flash Duration: 1/350 to 1/20000 seconds; Exposure Control: Exposure control system: TTL autoflash and manual flash; Flash Exposure: Manual. FEB: ±3 stops in 1/3 stop increments; Compensation (FEC): Manual FEC; Sync Mode: High-speed sync (up to 1/8000 seconds), first-curtain sync, and rear-curtain sync; Multi Flash: Capable of up to 90 times at 99Hz; Wireless Flash (2.4G transmission); Wireless flash function: Master, Slave, Off; Controllable Slave Groups: 3 (A, B, and C); Transmission Range (approx.): 50m; Channels: 16 (1-16); Auto Focus Assist Beam; Effective Range (approx.): Center: 0.6-4m / Periphery: 0.6-2.5m; Power Supply: Lithium Batteries: 7.2V/2000mAh; Recycle Time: 0.1s-1.7s / Red LED indicator indicates when the flash is ready; Full Power Flashes: Over 500; Power Saving: Automatically powers off after approximately 90 seconds of inactivity (60 minutes if set as a slave); Sync Triggering Mode: Hotshoe, Optical triggering; Dimensions/Weight: W x H x D: 150 x 62 x 38mm; Weight without battery: 210g; Weight with battery: 290g; Package Included: 1 x V350 Camera Flash; 1 x Mini Stand; 1 x Protection Case; 1 x Diffuser; 1 x Li-ion Battery Pack; 1 x Battery Charger; 1 x Battery Charger Cable; 1 x Instruction Manual;